diff --git a/packages/block-editor/src/components/block-switcher/pattern-transformations-menu.js b/packages/block-editor/src/components/block-switcher/pattern-transformations-menu.js
index 792f6d0bb20121..46fd83c92d91f6 100644
--- a/packages/block-editor/src/components/block-switcher/pattern-transformations-menu.js
+++ b/packages/block-editor/src/components/block-switcher/pattern-transformations-menu.js
@@ -3,7 +3,7 @@
  */
 import { __ } from '@wordpress/i18n';
 import { useState } from '@wordpress/element';
-import { useInstanceId } from '@wordpress/compose';
+import { useInstanceId, useViewportMatch } from '@wordpress/compose';
 import { chevronRight } from '@wordpress/icons';
 
 import {
@@ -34,6 +34,7 @@ function PatternTransformationsMenu( {
 } ) {
 	const [ showTransforms, setShowTransforms ] = useState( false );
 	const patterns = useTransformedPatterns( statePatterns, blocks );
+
 	if ( ! patterns.length ) {
 		return null;
 	}
@@ -60,21 +61,22 @@ function PatternTransformationsMenu( {
 }
 
 function PreviewPatternsPopover( { patterns, onSelect } ) {
+	const isMobile = useViewportMatch( 'medium', '<' );
+
 	return (
-		<div className="block-editor-block-switcher__popover__preview__parent">
-			<div className="block-editor-block-switcher__popover__preview__container">
-				<Popover
-					className="block-editor-block-switcher__preview__popover"
-					position="bottom right"
-				>
-					<div className="block-editor-block-switcher__preview is-pattern-list-preview">
-						<BlockPatternsList
-							patterns={ patterns }
-							onSelect={ onSelect }
-						/>
-					</div>
-				</Popover>
-			</div>
+		<div className="block-editor-block-switcher__popover-preview-container">
+			<Popover
+				className="block-editor-block-switcher__popover-preview"
+				placement={ isMobile ? 'bottom' : 'right-start' }
+				offset={ 16 }
+			>
+				<div className="block-editor-block-switcher__preview is-pattern-list-preview">
+					<BlockPatternsList
+						patterns={ patterns }
+						onSelect={ onSelect }
+					/>
+				</div>
+			</Popover>
 		</div>
 	);
 }
diff --git a/packages/block-editor/src/components/block-switcher/preview-block-popover.js b/packages/block-editor/src/components/block-switcher/preview-block-popover.js
index 78e29f4ad09fba..f978ed43af1da9 100644
--- a/packages/block-editor/src/components/block-switcher/preview-block-popover.js
+++ b/packages/block-editor/src/components/block-switcher/preview-block-popover.js
@@ -3,6 +3,7 @@
  */
 import { __ } from '@wordpress/i18n';
 import { Popover } from '@wordpress/components';
+import { useViewportMatch } from '@wordpress/compose';
 
 /**
  * Internal dependencies
@@ -10,22 +11,27 @@ import { Popover } from '@wordpress/components';
 import BlockPreview from '../block-preview';
 
 export default function PreviewBlockPopover( { blocks } ) {
+	const isMobile = useViewportMatch( 'medium', '<' );
+
+	if ( isMobile ) {
+		return null;
+	}
+
 	return (
-		<div className="block-editor-block-switcher__popover__preview__parent">
-			<div className="block-editor-block-switcher__popover__preview__container">
-				<Popover
-					className="block-editor-block-switcher__preview__popover"
-					placement="bottom-start"
-					focusOnMount={ false }
-				>
-					<div className="block-editor-block-switcher__preview">
-						<div className="block-editor-block-switcher__preview-title">
-							{ __( 'Preview' ) }
-						</div>
-						<BlockPreview viewportWidth={ 500 } blocks={ blocks } />
+		<div className="block-editor-block-switcher__popover-preview-container">
+			<Popover
+				className="block-editor-block-switcher__popover-preview"
+				placement="right-start"
+				focusOnMount={ false }
+				offset={ 16 }
+			>
+				<div className="block-editor-block-switcher__preview">
+					<div className="block-editor-block-switcher__preview-title">
+						{ __( 'Preview' ) }
 					</div>
-				</Popover>
-			</div>
+					<BlockPreview viewportWidth={ 500 } blocks={ blocks } />
+				</div>
+			</Popover>
 		</div>
 	);
 }
diff --git a/packages/block-editor/src/components/block-switcher/style.scss b/packages/block-editor/src/components/block-switcher/style.scss
index 5eaba08bf94ae2..afcb576bd8db49 100644
--- a/packages/block-editor/src/components/block-switcher/style.scss
+++ b/packages/block-editor/src/components/block-switcher/style.scss
@@ -84,27 +84,18 @@
 	min-width: 300px;
 }
 
-.block-editor-block-switcher__popover__preview__parent {
-	.block-editor-block-switcher__popover__preview__container {
-		position: absolute;
-		top: -$grid-unit-15;
-		left: calc(100% + #{$grid-unit-20});
-	}
+.block-editor-block-switcher__popover-preview-container {
+	left: 0;
+	position: absolute;
+	top: -$border-width;
+	width: 100%;
+	bottom: 0;
+	pointer-events: none;
 }
 
-.block-editor-block-switcher__preview__popover {
-	display: none;
+.block-editor-block-switcher__popover-preview {
 	overflow: hidden;
 
-	// Position correctly. Needs specificity.
-	&.components-popover {
-		margin-top: $grid-unit-15 - $border-width;
-	}
-
-	@include break-medium() {
-		display: block;
-	}
-
 	.components-popover__content {
 		width: 300px;
 		border: $border-width solid $gray-900;