Both this and that thread have JR3T-14G371-BJD
Unfortunately i don’t believe there is a fix for this, however taking pictures of the inside of the unit would help me confirm my theorys, specifically the eMMC chip.
Either way, i have added JR3T-14G371-BJD to “My20 models” for Syn3 Updater to detect this model as My20 however, it won’t stop them seeing this message and still saying “No” and then bricking their APIM, a update for Syn3 Updater would need to be released to fix that, and i have no intention of releasing a new version of Syn3 Updater at this time.