I have personally been very happy with FreshRSS. Nowadays I use Nextcloud News (just a Nextcloud) app for it. So if you already have Nextcloud you don’t even need to selfhost something extra.
They both have WebApps. FreshRSS has a few themes to fit your taste and Nextcloud News will obviously follow your Nextcloud theming.
As far as apps go, FreshRSS has (probably) more than Nextcloud News. I personally like Feeder (only in PlayStore but worth it imo). For Nextcloud there is an App with the same name. Also good imo, but FreshRSS/Feeder has more customization options.