Hi,
Likely, the main problem is that we currently have two separate text layouts, and Krita’s font selection uses a different font selection from the other layout (Qt’s). I’m currently trying to fix that in the fonts MR. It will be fixed in the Krita 5.3 release, until then, use Krita 5.1.
It’s also why I haven’t updated much last month, because I’m just literally trying to get that code finished. There’s basically been no news beyond that.