Will adding a fan to my wireless charger still affect battery?

I know if I charge my iPhone 12 Pro Max wirelessly, the battery will degrade faster than wire charging,

Wireless charging does not degrade the battery faster. It's actually better for your battery than wired charging.

but what if I put a fan on the phone to help cool down the phone while it’s wirelessly charging, will that help in solving the battery degrading problem?

Well, a fan will help prevent overheating while charging.

Goku3508_iOS wrote:

I know if I charge my iPhone 12 Pro Max wirelessly, the battery will degrade faster than wire charging,

Um, no.

but what if I put a fan on the phone to help cool down the phone while it’s wirelessly charging, will that help in solving the battery degrading problem?

It is not possible to stop batteries from degrading. No matter what you do, the battery will degrade.

See here:

When to charge your iPhone or iPad - Apple Community

Goku3508_iOS wrote:

I know if I charge my iPhone 12 Pro Max wirelessly, the battery will degrade faster than wire charging,

Sorry, but how do you know this as a fact?

Goku3508_iOS wrote:

Oh, My knowledge is wrong? Never knew, thanks.

It happens to all of us at some point.