If you have enough of Apple dictating what you can do with you iPhone and are looking for an alternative, consider getting a Pixel and install GrapheneOS as the operating system. You’ll get a great phone and you’ll avoid Googles privacy invading operating system.
If you like app stores, consider using f-droid to find apps, but if you are technical savvy, rss and apks are the most flexible options. Obtanium might be a nice addition if you want full control, but don’t want to check manually for updates or handling downloads.