Correct. You have a 2016 vehicle with original APIM, the MY20 warnings will not apply to you unless you have changed your APIM to a new 2020+ model which the part number will begin with L or 5… You are presently on Sync 3.0, the ONLY way to get to Sync 3.4 with new maps is to reformat. And there is no going back to Sync 3.0. MY20 does not come with Sync 3.0.
If you want to know exactly what your APIM part number and manufacturer date is, run the APIM Interrogator in the Syn3 Updater app. It will tell you all you need to know about your hardware and software installed on your APIM, including maps, etc. Or you can follow the tutorial…
Tutorial: APIM Interrogator Utility - Ford / Guides & Info - CyanLabs Official Community
I saw your post on F150Forums. https://www.f150forum.com/f118/upgrade-sync-3-v3-0-v3-4-instructions-458828/index433/#post7034859
The automated process here takes many considerations from the information supplied to create the installation packages. There is a minimal installation package supplied with the files from F150Forums. You will see differences in the installation methodologies. Keep in mind that CyanLabs just packages the files to be installed so you don’t have to do it manually. The files are exactly the same, downloaded from the same servers, containing the same hashes. The files all come from the manufacturer, and are final release files, not betas. This is true for most anywhere you download these from. Airborne Ape, JRSBill, and others have done a very good job of maintaining the files and providing support for this.