Surely its not too much to ask that the platform we are paying for displays accurate information about its own transactions? Suggesting additional 3rd party apps is not the solution! Fixing the analytics is what is required. A good start would be Shopify giving a bleep ofc.
And you know GA4 is an absolute disaster right? - including conversion tracking discrepancies, inaccurate traffic reports, integration problems with Google Ads and many more.
Have a read through some of these results: https://www.google.com/search?q=is+GA4+unreliable