Anyone interested can find (usually free) externally hosted freshRss and TinyRss hosts on the chatons website. Select one of those in the “based on” drop down menu.

I’ve tried both and like neither. As far as I can tell, they only have a small number of apps. And none of them work offline. With a regular RSS reader you can refresh it when you have internet access, then everything is available when you do not. Like an email client or any other such software.

But it might be suitable to you. So check out the chatons.