Yes, unfortunately fixing stuff / updating is not their priority...at all.
It is taking months or ...maybe even years. There is really a lack of decent basic support.
Although they advertise as Joomla 5 compatible.
I use Indigo. Also originally designed in J3.
I tried QuickStart 4.2 but it was a big mess.
For expired articles, I tried several options with no luck.
First it took me ages to find out, because the label is white on a white BG so the only visible effect was some shifting in the layout.
-Anyway, i gave up and now I just fill in a Finish Publishing date for 2034 and the label is gone.
Good luck!