I’m currently using RSSGuard. I also have used and liked using NewsFlash and Akregator. I recommend trying all three if you can. Fiddle with the settings to get the desired look and experience, they are flexible apps.
Only RSS option that is on web and android/iphone is either through nextcloud news. Or try host your own tiny RSS or fresh RSS instance or find a public one you can use? Most RSS reader will let you login with them.
I prefer to read news and blogs on my computer so I have not tested mobile apps in any way.
It is what it is 😂