Aurora 'Store' is a client for Google Play that lets you filter on apps without ads or in-app purchases. My experience is that that's be a decent proxy for "don't show me all the bullshit".

It's also a good proxy for "no results" but then at least you know there is no free app that does what you want just yet :)

Anyway that's what I use to get the proprietary government and other societally required apps, and while I'm not on Lineage right now, it's meant to work there