Be aware that Witcher doesn't take place in some sort of real world so Geralt could (in theory) know fighting techniques T'Challa doesn't even know exist. I also think some monsters, like trolls or wyverns, can be above Cap's or Taskmaster's level and closer to Thing's or Hulk's.

^No Troll or Dragon is as strong as Hulk. But even if such were the case, such opponents do not have the Intelligence, Speed, and Skill of Panther. Geralt being able to bring them down is a true testament of his planning and more....but he really isn't challenged in regards to fighting ability by such threats. Further, Wolverine has fought the Hulk, yet has still been defeated by Panther and Tchalla at other times had the upperhand- I believe the same could be so with Witcher. Geralt defeating such strong monsters doesnt mean a great deal, especially when Panther has fought and defeated some of the same things, defeated those who have done more, and faced greater threats.

In regards to your point about Witcher knowing styles Panther may not, that's fine really....we know for sure though that Tchalla knows styles Geralt does not, having created at least 2 of his own unique styles.

^Ha! Yea...but Axii barely works on some monsters and other beings, Tchalla has psionic resistance on a level to resist Emma Frost...

If you dont want to take that as canon, then there are other occurrences where he has shown telepathic resistance against Zenzi, his villain who once mentally took control of an entire army. Axii does not have that kind of reach.

I always feel there’s a difference between mutant/ science based powers/telepathy compared to their magic ans occult counterparts buy i could be wrong.

^Ahh...could be🤷🏾‍♂️. Overall though, having some form of Mental Resistance has to count for something regardless of whether its tech based, mutant, or magical.

Even if there is indeed a difference, Tchalla has shown to be resistant to the Magical Telepathy of the Anansi- an ancient race. It is not mentioned that their Telepathy is magic based, but we know they aren't mutants, it's not tech, and we know that they are an ancient arachnid race that possess mysticism. So thus, it can be argued their Telepathy is arcane of some sort.

Kinda like how if Storm hit Superman with lighting it wouldn’t do as much to him compared to Thor who’s lighting is part Magical. And magic goes against science and physics a lot of the times. This would be an interesting question on its own actually.

^It would be🤔😉! But I get you guys. I dont think it was ever doubted Axii was magic based.

Anyways, as I've said, Tchalla has shown resistance to magic based Telepathy.

Wakanda Magic Telepathy?