I think maybe it’s because /e/OS as well as LineageOS for microG (I think) don’t have any user accessible signature spoofing permissions like other applicable ROMs do.
On /e/OS, f.i., Signature Spoofing Checker shows DISABLED. There was a thread about this quite some time ago. Ooh, found…
Make /e/ OS ROM Signature Spoofing microG ready
Using my other ROMs as an example: besides microG, the other app that needs/uses signature spoofing is FakeStore (com.android.vending). It’s included with /e/OS and pretends to be the Play Store. Most useful with Aurora Store in root mode. Apps installed will think they were installed from the Play Store. Reference…