Why can't I find the right Facebook Pixel for my ads?

[stumppy8]

Hours and hours sunk going in circles over such a tiny problem.

Shopify detects 1 Pixel which is the same as my facebook business account.
However, I have another pixel on my facebook personal account (located on the main business account) , which is not the same as what shopify detects.

Whenever I go to make an ad on facebook - it only lets me choose the pixel that isnt connected to shopify.

Absolutely pulling my hair out, help much appreciated.

Thanks