Alot of people I've known in real life have been dysphoric, but had to go off hrt for other reasons which doesn't really count as detrans. Honestly, although I'm diagnosed and have known about myself my whole life, I don't even know if dysphoria is the only way to tell if someone will detransition. I say this, because alot of the really really famous detrans people claimed to be dysphoric or have very severe dysphoria and started transition from a young age. I do think there are some red flags, like not knowing the difference between dysphoria and body dysmorphia.(there are an awful lot of cis people who mix the two up...) I honestly don't know anymore and the only detrans people who I feel are really really bad are the ones who try to interfere with others getting hrt.