If you want to customise what is on your main Mastodon timeline, there are lots of ways of tweaking it listed in this guide:
➡️ fedi.tips/does-mastodon-and-th…
The guide also mentions that there is no algorithm in your Mastodon timeline. The only posts you see are from accounts and hashtags you follow, or posts that are shared by accounts you follow.
Does Mastodon and the Fediverse use algorithms? How do I customise what’s in my timeline if there’s no algorithm? | Fedi.Tips – An Unofficial Guide to Mastodon and the Fediverse
An unofficial guide to using Mastodon and the Fediversefedi.tips