third party e-commerce attribution

I have a client who sells high dollar niche products, they are on craft CMS. We are trying to squeeze every bit of ROAS, but client and account manager are pushing me to turn off campaigns because their in platform ROAS.

Anyone ever use Growify, Triple Whale, Wicked Reports etc to help track this?

Id really love to use wicked but am afraid of the perceived complexity and price tag.

Things like Growify, redtrack, triple whale are just kinda glorified UTM trackers, it seems.

Anyone have any recommendations? Id like to show that these campaigns and keywords are making future customers - but have no real way to show it with our GA4 setup.

Any ideas? Any praise on softwares?