I m no expert but have had a few Focus and Fiesta
Two things.. maybe
When the batteries are getting close to life expiry the dash shows up odd messages
They have a control unit a PCU or TCU I think it’s called or is it
ECU.
These wear out - electronic control unit
Maybe see a good auto electrican
Ford won’t do anything way outside warranty and dealer prob try and maximise their invoice
May not be these two things but might be