He didn't get it in canon, the only canon material is what is done by Kishimoto and Boruto:nng manga is not done by him.So what you’re saying is he not going to be able to do it in cannon even tho he got the mark in cannon huh?
Even tho he said it's canon, it still contradicts what Kishimoto imagined for Boruto:Don’t matter he said it’s cannon so it’s cannon, why even come in a bourto thread if you don’t believe it’s not cannon or waste your time commenting? You always talking bout it but stay in ever bourto thread even though it’s not cannon makes no sense to me.
He is talking about manga chapter 23 he absorbed that fire with his seal.I'm sorry but filler feats doesn't count my friend U_U.