Yes. LineageOS, GrapheneOS, Arch, Sailfish, various other open distros, Windows Phone, and a surprising number of random proprietary options (these are sometimes based on Android, and have some social media apps, but can't run regular Android apps that weren't specifically designed or altered for it) including for modern dumbphones. There are always more over time, too.

There's also old versions of iOS and Android. We don't want to end up in a situation where people are locked into one of only two vendors and can be forced to keep buying the newest model to use an ID app that only supports the most recent software. That'd be even worse for the environment than the current disposable smartphone culture.

Everything to do with the age verification push is corrupt and stupid to begin with. There isn't even a legitimate cause behind all this for forcing ANY app, even if it didn't also force people to buy a specific, expensive, privacy-invading American product.