I don't want to speak for
Chinook, who is very well versed on these things, but it appears between the two of us we've narrowed in on the premise that Trae IS eligible for an extension this off-season, but he is NOT eligible for a SuperMax until next off-season (regardless of the qualifying criteria, which he has not met). So, if Trae wants a SuperMax, he'll need to make an All-NBA team next year and sign it with ATL and then he will not be eligible to be traded for one full year until after signing the DPE.
At the end of the day, I don't see a SuperMax in Trae's future.
My guess is that he'll sign some kind of 30% extension that expires after his 10th season, when he'll be able to sign a 35% max contract based on tenure.