Has anyone tried the procedure in the owner's or/and service manual?
It'll cost you a little time but should be able to avoid taking it a third party to program a remote.
There also seem to be plenty of videos.
BTW, is there a power fold mirror option for the "domestic" Fiesta ST?
View: https://youtu.be/S7XooWtKgXo?t=17
My Brother has a Chevy Impala and I swear programming a new remote for that thing would cost a few grey hairs as they intentionally incorporate a series of ten minute delays as a security deterrent. 😂 Any person with even a mild case of ADD or ADHD would have to set alarms to program that thing.