hplip is the hp printer drivers, I suggest that they brought in new programs to help with printing.
Nothing to worry about, but if you dont print you could remove hplip and if that dosent remove the tool find their names and remove them.
I’ve noticed that too in today’s upgrade on Silverblue. I can’t argue on the necessity of these HPLIP GUI packages, as I don’t know the reason behind it, but they certainly don’t fit well into the nice GNOME desktop, with it’s low-res icons. They also bring qt5 packages which weren’t in Silverblue’s base install.
This is what rpm-ostree db diff shows as added packages:
You can remove the HPLIP GUI packages with sudo rpm-ostree override remove hplip-gui. Doing this will remove both GUI apps you’ve noticed in the App Overview.