Can I retain reset pixel setup while retaining its data

So, pretty much ive been having issues since the beginning of my new store regarding data acuraccy. Ive got meta pixel + conversions API setup right now, but it seems in the ads manager only about 70% of my purchases come through, and events manager is always under-calculating or over-calculating the purchase events despite match quality being 8.4.

Initially I installed the pixel through the generic automatic installation through shopify. However, because of the issue sim having with data accuracy, im now looking into installing with GTM or GTM + strape as people have said this method provides a lot better accuracy, so hopefully conversions data is better.

However, I dont know if its too late now. Could I unlink the same pixel from my shopify and relink using GTM + strape, or would I have to make a whole new pixel? Id like to simply reinstall the integration differently, but keep the actual dataset how it is and retain its learning. is that possible?