I believe that 9 space 1 space 1 space S01E01 should grab it without edit (see example below) but if you edit the metadata once with the current name Infuse will remember that for future episodes too so you could leave it as is if you like.
I’m not sure what you can do per se, but what NC Bullseye said is correct from personal experience. Editing a file once and similar ones will follow suit without further user interaction. I really wish tv metadata can be fetched if you add the year into the file name like movie ones.