Only working in ABAP Platform 2022?

[skeuker]

When importing the ABAP Git Repo into an ABAP Platform 2021 SP 01 System I get syntax errors. For instance interface /iwbep/if_v4_mp_basic_rest is missing. Could you confirm, that the README file in this repo stating that it should work on ABAP Platform 2021 is incorrect or whether a higher SP or Feature Stack is required for ABAP Platform 2021? If so I will seek to have the affected system upgraded.