(why) is `extrepo` ignored completely?

[DJCrashdummy]

not really a big issue but just a short question resp. feature request:
i really like minsources but the one thing i recently encountered is, that there seems to be no indication in it that a repo of extrepo is in use. not to mention that it does not tell which repo is activated and/or it can be managed via mintsources.
i'm not necessarily talking about mintsources should become a GUI for extrepo, but at least a hint that other (additional) repos are in use than the ones which are listed in it, should be there.

or am i missing something?
because i always thought extrepo uses the normal deb-format and therefore should show up in mintsources. 🤷
if not, it is IMHO really unfortunate that there is not even the smallest clue in mintsources, that other repos are in use.

yes, i know extrepo is not that popular - as it should be IMHO - as it is even easier to use than Ubuntu PPAs and works for all Debian-based distributions.