Facebook does, I'm not sure why it didn't in your case. It adds an "fbclid" parameter that is quite long. I just tried it to confirm.
Edit: Perhaps it only mangles links for logged-in users? That raises the possibility that some of the others may also only affect logged-in users.
(Trying with other ones I'm logged in on: Reddit doesn't mangle (obviously), Twitter doesn't mangle.)
Facebook: no.
Pinterest: ?utm_source=Pinterest&utm_medium=organic.
ChatGPT: ?utm_source=chatgpt.com. (Aside: wow it’s confidently and atrociously wrong if you ask it about me. Ask it just vaguely enough, and it hallucinates someone clearly inspired by me, but who has done a whole lot of stuff that I haven’t. Ask it more precisely about me, and it gets all kinds of details wrong still. I feel further vindicated in hating this stuff. You made me use ChatGPT for the very first time.)
LinkedIn: no.
Twitter: no.
Reddit: no.
YouTube: no.
> if you get enough traffic that you can pick which sources you want to allow, that's a good problem to have.
Nah, I just don’t care about them. It’s my place, I’m doing things on my own terms. Should I discover it to be causing me problems, I’ll burn that bridge when I come to it.