I mean of course it was impressive that Gohan was matching SSB Goku in terms of power, but honestly it’s more impressive to me that he was somehow still conscious for a bit when he took a punch from Goku once he turned on Kaioken

Also, there’s a good chance Goku was in x10 or x20 there and not a lower level of Kaioken, judging by everyone’s reaction (specifically Vegeta’s)

Being able to survive a hit that powerful is insane, even more so that he was somehow still conscious for a few seconds

Correction, it probably wasn’t x20 because iirc SSBKKx20 wasn’t shown off until Goku faced Jiren. I do believe he was probably in x10 though, which had been his max power for a while by this point.
Also not implying Gohan is SSBKK level, just pointing out how insane this feat is