I know why this happens. My comments get more, sometimes many more, comments and likes on Mastodon than on Bluesky.

On Mastodon, it’s all how many people you follow and who follow you back. There are other ways to find posts on Mastodon, like the federated tab on your server, but many people don’t seem to use them as much. To find things on Mastodon you must follow lots of people. You have a lot more work to do on Mastodon if you want things to read and for people to read you.

Compared to Twitter, this is also true on Bluesky, but management there has tried to give users ways to find people other than an algorithm (which Bluesky does have in its Discover tab, which I notice post quality drops substantially from my curated following list), in the form of starter packs. On Mastodon the account FediFollows is a good place to find groups of people to follow, and FediTips for general ideas and advice.