Not every app has a license check. I bought an app via play store on my old Huawei two weeks ago, extracted the apk and installed it on my Pixel without Google Service.
Works like a charm.
I've used https://github.com/apk-editor/APK-Explorer-Editor from F-Droid to do this, but it should also work with other tools.
Just be aware, that some apps might have another check or depend on google services.