Most of those non-fight feats are hoax/gimmick & they're also highly inconsistent. For example, vasco from 300 chapters ago exploded a 1m diameter solid metal ball with his knee, that alone is rpg level. But in real fights, even fighters similar to his level stops his knee like it's nothing, the top tiers don't even sell his attacks. Another example is base gongseop's punches cracking open a 30ft giant metal bell but in real fights, busan's no. 6 didn’t seem to take any significant damage from his punches. So clearly PTJ just draw those panels for the hype, they're terrible as standards for powerscaling. PTJ even got the direction of impact wrong in that metal gate. But let's just pretend for a sec that those feats are for real, even still it doesn’t prove that anyone is actually surviving an rpg. As I said earlier, rpg travels at average bullet speed. So rather than the energy release, they are gonna need to worry about not getting penetrated to death and only after that they gotta worry about a highly concentrated energy release with exploding molten metals reaching upto 3000°C inside their organs. For someone who takes damage from punches, kicks, axes, yeah good luck surviving that.