You are always able to add playstore in. But of course this comes with some cost to privacy.

There's also other app stores like f-Droid. Usually these are populated with the same apps but often there are ones you are going to have a harder time getting.

Does anyone know if there's a way to do a sandboxed playstore? Like you can use it to download the apps and update (assuming this won't be automatic) but that it is contained otherwise?