Owners of small servers, if you want to expand your view of the Fediverse you can use relays.
General relays tend to use a very great amount of resources, so you may prefer to use topic-specific relays such as those provided at FediBuzz:
There's more info on how admins can add relays to Mastodon servers at:
➡️ https://fedi.tips/using-relays-to-quickly-expand-a-servers-view-of-the-fediverse