How to deal with the IQP?

Maybe consider:
The Power of Pawns by GM Jörg Hickl (2016)
https://chessbookreviews.wordpress.com/tag/the-power-of-pawns/
https://www.newinchess.com/media/wysiwyg/product_pdf/9034.pdf

You could write a book about IQP positions (maybe someone has).
Very generally speaking, the side with the IQP usually seeks active piece play, sometimes a kingside attack. The side playing against it wants to blockade it and trade pieces into an endgame where the isolated pawn is a liability, sometimes a fatal liability.
Here's a video that's underappreciated:


Trade minors if against the IQP, but keep Queen and at least one set of Rooks. Also hold a c- or e-pawn. the Rook goes in front of the pawn, blocking it, and the Queen goes behind it. If he tries to go behind to defend then push c/e-pawn then the IQP is pinned. The Queen makes the defender's King's participation risky