magento2 auto generate sku for new product based on custom confgiuration. Auto SKU Generator Addon provides the functionality of generating the SKU automatically
Store->Configuration->AUTO SKU->Configuration
Here you need to specify the prefix for the sku for example : D, AAA, DAC
Here you need to configure the start integer for example start from : 1
This is the length of the sku, for example for length 5 -> D0001.
K00001, K00002, K00003,........
SKU0001, SKU0002, SKU0003, SKU0004,....................