Update Sync 3 MY2020

Hello,
Car: Ford Escape 2020
The current version of Sync 3 is: 3.4.21194
I want to update my Sync 3 maps and software.
What type of installation should I choose?

Should I only update the maps?
Can I also update the software to version 3.4.22048?

You should update your profile, since a 2013 fusion is listed there.

About map installation without reformat, check this guide → Tutorial: 2020 North America 2.20 Map Installation (Stand-Alone without Reformat) with Updated NAV_Voice 06/21/2021

Since you claim to have a MY20 unit, DO NOT REFORMAT IT
You will need to work with autoinstalls. Keep MY20 protection active in Syn3updater, you can create the USB with the tool or manually.

I would stay at 21194. There really is nothing to be gained right now by upgrading. You should be at the most recent maps. New ones will be out soon hopefully.

What maps are on the unit? Probably NA 2.20 which is the latest. You are eligible to receive free map updates from Ford. Ford - Sync3 Map Update (syncnavigation.com)