I am wondering, maybe we should add one more condition, and when fullBackupSupport is not set, just return store?

Some actions, such as createUserKeysBackupActionTypes, are currently used in production, which means we'll set some values in the store now. Later, when developing and wanting to change something, we might need to introduce migration, which could slow us down. Adding this will be still fine for testing and could avoid some additional work for us

Good point, I'll do that

I fixed that along with updating D14883, separated the invariant conditions