How do you add a Physics volume to a waterbody?

Hey just starting off and need some help. (First post ever so no idea if correct spot)

Currently my waves are moving higher than my PV and I have no idea how to simulate swimming now.

I want to be able to swim in large waves as fluidly as smaller-to-no waves.
(Yes I can swim fine in shallow-small waves. I am assuming you can attach the PV to the waterbody somehow but I cant find it lol :frowning:

Thanks for checking this out! :slight_smile: