Most likely.

Without digging through the Peertube source, a codebase I have never looked at before, it's hard to say.

No, I was suggesting that peertube.wtf should have asked piefed.zip for the details of the comment. That would be the most authoritative place to ask, and that's what PieFed, MBIN, and Friendica do.

For the comment that you made, piefed.zip would've signed it with your private key, and sent out 2 copies - one to technics.de and one to tilvids.com. After receiving it, technics.de is no longer involved, but tilvids.com would've sent to comment out to all the subscribers of 'The Linux Experiment'. We can tell they did in fact do that, because the comment you made on piefed.zip is visible on piefed.social.

It doesn't have your private key though, and it additionally doesn't sign it with the channel's private key, so the question is then not 'was the data sent out?', but rather 'how do remote instances know to trust that this comment was actually made by this person?'. If the author was also on tilvids.com, then it has access to the private key, so it can be signed when it's sent out. If the author was from Mastodon, their comments include a cryptographic hash inside the JSON, so that can be used. For all other authors, the best thing to do - I would think - is grab it from the source.

I don't actually know what other PeerTube instances do in this circumstance though. Comparing the amount of comments on the host instance, vs. other PeerTube instances, vs. PieFed, reveals no discernible pattern. For 'The Linux Experiment', piefed.social has comments from misskey, from piefed, and from mbin that are absent from remote PeerTube instances. Hopefully, someone who's familiar with their code can shed more light on their internal federation - if there's something we can do to guarantee comment visibility on remote PeerTube instances, then we'll do it if it's feasible.

EDIT: just been digging through my server logs for requests of comments I made from PeerTube instances, and discovered tube.alphonso.fr - they have your comment: https://tube.alphonso.fr/w/eSYuduJSbZ9s7K4pFT3Ncd - so how fully PeerTube instances federate comments might be a policy decision that admins set, or it might just be buggy behaviour.