How can I track checkout page on Shopify without upgrading plan?

[mralberget4a]

Since Shopify Won't let you add code to the checkout page without paying for a more expensive plan, I've had to rely on the automatic set up. 

Neither Tik Tok or Facebook pixel tracks anything at the checkout page. Seen more people have had this problem but no real solution. Google Analytics tracks purchases without problem, but meta/tiktok campaign reporting is basically useless without data on conversions.