Starting in late 2021, when a user opts out of interest-based advertising or ads personalization, the advertising identifier will not be available. You will receive a string of zeros in place of the identifier.
Learn more: Advertising ID - Play Console Help
Google provided an another SDK for their store, App set ID - Identify developer-owned apps | Android Developers
And Huawei provided the similar SDK for their store ODID - Document
So, do you have something like those SDK, or you are going to provide something like that?