My favorite resource to figure out dining info is https://www.wdwmagic.com/dining.htm they include info on outdoor dining and you can sort by characters.
Technically there is some informal patio seating at Topolinos and staff told me over the phone that you could eat there, but people are skeptical and no one has reported success. I am not sure you would be able to see the characters.
I also created this list of outdoor dining locations at the parks and resorts. It is a coupld of months out of date for new openings.