Hi all, I see that two years ago @boldandbusted -- Jesse Adelman (aka "NightMonkey" on Freenode) -- created an unofficial IRC channel on Freenode -- which was subsequently migrated to Libera.Chat:
https://forum.plantuml.net/12376/%23%23plantuml-on-freenode-irc-is-here-for-you?show=12376#q12376
However, it looks like there isn't much usage of that semi-live community Q&A feature.
Hence I've created an **unofficial** Discord server for semi-live PlantUML Q&A:
https://discord.gg/V6Qay5FKqx
I've already posted a question on there as I haven't received a response via this forum. Hoping someone will help!