This is interesting:

Mastodon Follow Pack FAQ 1.0:

What are Follow Packs?

They are just packaged topical lists of up to 35 accounts you can follow from your Mastodon or other Fediverse account. You can follow the entire pack by importing a file. And the entire pack loads into a list, so it becomes a feed for that subject. You can also just browse for accounts you might want to follow individually.

So, they’re like Bluesky Starter Packs?

Yes, but not quite as convenient. It’s not hard, but because Mastodon does not have a one-click way to do this, you need to download a follow pack file and then use Mastodon’s import facility. Instructions are provided in the directory and also below.

These "follow packs" can also be used from #snac pretty easily. To do it, just download the list you are interested in and run the following command for each one:

snac import_list $BASE_DIR $USER_ID /path/to/the/file.csv

The list will be created and the accounts inside followed. After that, you'll find a link to the list at the top of your private timeline. Please, take note that these lists are not automatically populated; they will eventually fill with the new posts from the new accounts, that will also appear in your timeline.

snac's web UI does not allow maintaining these lists, but you can do it with any Mastodon API client or from https://mastodonlistmanager.org (which is, em, also a Mastodon API client).