@dredmorbius With Android, I'm on Subway Tooter. It has a feature to load hashtag searches from foreign instances (see above), and public posts from their local timelines (if the relevant API endpoint is available). I make use of both, even the implementation is a bit clunky. Somewhat helps to find new accounts to follow.
Still waiting for a web frontend that implements either of those features.
The social network of the future: No ads, no corporate surveillance, ethical design, and decentralization! Own your data with Mastodon!