works for me. I think it is not just a matter of your client, but your instance. they federate and index hashtags differently. I have a timeline of 67 #nfb25 tagged posts on mastodon starting with your most recent one, going right back to last July ending Nfb24.

@cachondo I actually think I may have gotten it working finally, but yeah it wasn't obvious how to get it to go with my client, thanks

you can also follow any hashtag from your own instance on the web,such as by going to mastodon.stickbear.me/tags/nfb….
I'm not logged in on there so I don't get the option but if I visit that page on my own instance, there's a "follow hashtag" button just beneath the level 1 heading.
This will add those posts to your home timeline on Tweesecake and any other app, I presume.
Or, of course, you can have an open search for the hashtag in the client, which updates separate to your home buffer.

@cachondo All good ideas if I have more problems, thanks for being so helpful

:) the fediverse is a really cool place to hang out, happy to help.
I really like having a time line composed of both people and hashtags, you see a lot of cool content this way.

@cachondo I can see that