https://wccftech.com/how-to/monster-hunter-rise-sunbreak-how-switch-skill-swap-works/

Monster Hunter Rise: Sunbreak introduces a new, interesting game mechanic called Switch Skill Swap. It allows you to change the Switch Skills you have equipped during a quest, not just before starting it. This can be very useful in combat, as you can tackle different situations using the most appropriate Switch Skill. Let’s see how to do that.

If you are new to Monster Hunter, you might want to know what exactly is a Switch Skill before using the new Swap mechanic. It is indeed a special and powerful ability, and each weapon has its own unique set. As you progress through the game, you will unlock new Switch Skill sets and try them out. They are extremely useful, as they can help you deal significant damage to monsters.