I am amazed that the power folding mirrors do not have a function to fold up on locking the truck and fold out upon unlock.
I did see a you tube video of a guy installing a module to the power mirror switch under the dash to do exactly that. Worked perfectly, he said he put ordering info in the link but I can’t find it. Can anyone help? I did find a module that will also alter the power window operation but I do not want that, I only want the module that he used for just the mirrors, can anyone help?

 

The only one I've seen is from an Australian company and it's unknown if it works on US Rangers.
Auto Window, Mirror & Passengers Window Module Suits Ford Ranger PX2 PX3 PU - Trac Electronics

And check out the 5G forum on the subject:
(8) Trac Electronics One Touch Open/Close and Auto Folding Mirrors | 2019+ Ford Ranger and Raptor Forum (5th Generation) - Ranger5G.com