It says no bootable device when I try this

How can I edit grub.cfg?

Did you also try pressing or holding f2 or f12 when booting?

Yup

Strange.

Only other option I could come up with is to reset the BIOS abd/or reinstall the latest BIOS

i had a quick look.
ended up here, where it basically says "start machine; Hold Esc; Press F1".
if that doesn't work, read the rest of the thread and some other search results please.

Did you ever try to find out if you have the actual windows files on your EFI partition? In your initial post, you have an image showing the following which would indicate an EFI install of the Linux OS you are using:

So at the grub rescue, try this: ls (hd0,gpt2)/EFI/

and check the output to see if there are any folders/files related to windows/microsoft. If there are, you should be able to manually boot windows with a proper series of commands without accessing the BIOS. The Linux system you installed shows and EFI entry and the default for windows 10 is to install EFI, particularly if it is GPT which is what your system shows.

In an earlier post, you asked how you could edit grub.cfg. You can't because you deleted the partition on which it existed.