I just can boot from the external usb-disk I formatted with the web-UI installer.
What would be the next steps to make both visible again, so that when taking the usb disk off, it will boot again from the internal disk?
I assume you just unplug the USB-disk.
Then power on and the internal disk is used.
Atleast that how it works for me.
The HD entry in the bios of my computer got disabled. This way the efi boot menu showed up with one Fedora entry and an other unavailable one. Without the USB Disk connected, the Fedora entry just not worked.
In the Bios with Shift & 1 I could activate it again. I can imagine, that it got deactivated when I created a new GPT boot record in the F44 installer (changing the boot-id?).
After rebooting it works now, and the second Fedora entry is back.
Boot0014* Fedora HD(1,GPT,b82817d6-ed98-4992-92d6-ae27b2ae1926,0x800,0x12c000)/\EFI\fedora\shimx64.efi
Boot0015* Fedora HD(1,GPT,28398274-a015-47a3-ae3f-a4609a6ddbd4,0x800,0x12c000)/\EFI\fedora\shimx64.efi