You cannot scale what you cannot track.
Before we spend more of your money, we check the tracking. The Meta pixel and the Conversions API both send purchases from Shopify, so Meta still sees a sale when a browser blocks the pixel.
Then every month we hold Ads Manager up against real orders in the store. The two drift apart. Duplicate events, test orders and failed checkouts can all show up in Meta as sales. When they disagree, the store wins: that's the number your budget, our report and any share of sales are worked out from.