Aug 05 2021
I'm running Windows 11 insider preview 10.0.22000.100 (co-release).
Certain file types, such as .jpg and .png, do not show up on the "Apps > Default apps > Choose defaults by file type" tab of "Settings".
The two file types mentioned open using Photos, but are not listed as such under the entry for Photos in "Apps > Default apps".
Other programs can be selected using "Open with" from the context menu, but they cannot be marked as "always use to open files of this type" there.