As a workaround, you can use a Krita plugin like BuliCommander (an orthodox file manager for Krita, that I prefer by far), or ImagineBoard, both will allow you to see and select your Krita files from within Krita.
For both plugins, it is true that you have to start Krita first and then can browse and select your files.
If you go for BuliCommander, then you need to patch the plugin according to the instructions given here, or you download the version patched by me from here for the time being, since its author currently has to work his way through mountains of diapers and such things, and that will take time:
And here one example how you could set up BuliCommander (the forum-link above will show much more and presents its capabilities):
For file management with Krita, BuliCommander is the best tool known to me, ImagineBoard has other use cases where it is predestined for.
Michelist