Although they differ from Twitter Likes, note that Mastodon Favorites are not private. For an example, I'll refer to one of your toots:
https://mastodon.social/@justhach/110696151311920356
Viewing it in the Mastodon web interface, I see an indication that 2 people marked it as a Favorite. I can then click to see those 2 usernames, listed here:
https://mastodon.social/@justhach/110696151311920356/favourites
Such listings are limited though. For example, I'm viewing a toot that you boosted, and I see an indication that it has been marked as a Favorite by 816 users; but when I click to view their names, I see only 40 of them listed.
... with just 0.91% of US social media visits
this yearin March this year, if this isn't wrong:https://www.statista.com/statistics/265773/market-share-of-the-most-popular-social-media-websites-in-the-us/
FB 53.09%, Twit 16.25%, IG 13.85%, ..., Reddit 0.91% ...
[Edited to fix my error.]
[I have no affiliation with the linked site.]