What country is UA?
Your APIM is coded 5253, the country code for Russia (RS). If you are in the Ukraine, you should use code 5550 for UP.
Your APIM is indeed a MY20 APIM, 5U5T-14G371-CKF with NAV/32GB storage. Free space is only 2.2GB, so do NOT install anything else on this unit or you might run it out of memory to process another update or rescue attempt.
This is what is installed:
5U5T-14G381-CJ (Sync 3.4.19274)
5U5T-14G391-AP (Sync Voice)
1U5T-14G421-BBH (Only part of the EU required components)
1U5T-14G421-BHH (Bulgaria, Belarus, Estonia, Lithuania, Latvia, Kazakhstan, Romania, Russia, Ukraine)
4U5T-14G422-BCF (NAV-Voice file)
1U5T-14G424-BK (EU License file)
and the entire NA map package…which cannot be removed with autoinstall.
A word of caution for what it’s worth: Any flashing of the EMMC with ‘other than Ford legally authorized software’ will void any warranty on this device and could make service departments suspicious. However, that is your choice to make.
It is possible to install a screen from an older machine to go through the procedure after downgrading to 3.3.19052, start the reformat to 3.4.21265 with NAV files that fit onto 32GB APIM. But as posted above, this is NOT guaranteed to work. You may end up with a bricked APIM. The screen you listed above, GR3T-188955-SB, would be suitable for this procedure. Again, that is your choice to make.
This tutorial is for vehicles that can use reformat, but it is useful nonetheless…
Tutorial: Current EU Maps Installation on US Imported Vehicles - Ford / Guides & Info - CyanLabs Official Community
Your best course of action might be to have your service department repair or replace the unit.