@vredesduyf it depends on how "federated" the instance is. If there's not a lot of content naturally coming in that has the tags or keywords you request, then it won't show, unfortunately.😬
This is a problem as well for Mastodon's hashtag following and content in general. It's an overall Fediverse problem. You have to find an instance that's well-connected with the content you enjoy. It's a bit of a learning curve to get right.