TikTok not reporting Complete Payment Event

I’m having issues where tiktok is seeing all my events like “add to cart” and “place and order” but it does not see “Complete payment” which I’m assuming is the Purchase event.

I believe the purchase event holds the product name, currency, quantity, price and total price.

What am I doing incorrectly as I do see sales on my website 100% (and Facebook pixel for example sees all that info with no issues).

Looking forward to hearing from you.