If I look at [1] whilst logged in to that instance, I do get a slightly different (first couple of pages have a few more posts, then it starts diverging) view than from [2] where I am not logged in. Also slight difference from [3] in that posts from, e.g., @[email protected] are not there but are in [1] and [2].

[1] https://octodon.social/tags/opensource

[2] https://tech.lgbt/tags/opensource

[3] https://photog.social/tags/opensource