This may be of help, as Telegram desktop devs have pointed out that notification agent declares that it supports HTML, but outputs its as raw text anyway
Ref: https://github.com/telegramdesktop/tdesktop/issues/27940#issuecomment-2119340506 ** Bug watch added: Telegram Desktop Github Issues tracker #27940 https://github.com/telegramdesktop/tdesktop/issues/27940 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2063056 Title: shows raw html message (<b>F12</b>) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/guake/+bug/2063056/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs