Correctly install Facebook pixel on Squarespace site

I have created a Facebook pixel and installed it on my Squarespace store page.. But it is not paired with all events correctly.

It appears the pixel is only capturing certain actions.

I need an expert to correctly install my pixel and capture all relevant information, so it can be used to optimise my Facebook / Insta ads.

Some guidance on how to set up my ads using this pixel would be appreciated too.