Facebook Retargeting Custom Audience Ads Not Running At All

Hi everyone, Im running Ads on FAcebook for an ecommerce store.
A few months ago I have created custom audiences for events like "AddToCart", "InitiateCheckout" and "Purchased".
And the problem is that this custom audience are still in pending for like 6 or more months, I tried today to run ads using this 3 custom audiences and perhaps I'm getting zero impressions.

Also what I tried was retargeting ads using Custom Audience with People who viewed website and it worked, I was getting impressions!

Pixel it self is getting all the necessary events and it works good but when doing ads for this type of custom events there is zero impression.

Now I don't really understand where the problem might be located, maybe the pixel is installed on website in a wrong way or maybe this is a global problem, I'm not really sure.

IS there someone who is running ads for this type of custom events and can confirm that retargeting works? and is there someone who might drop a hint why I am getting zero impressions on my custom audience retargeting ads).

Thanks in advance for answers

1. Custom Audience Size Too Small
When you create a custom audience from events like "AddToCart", "InitiateCheckout", or "Purchased", Facebook needs a minimum number of people in that audience to be able to deliver your ads effectively. If your audience is too small, you may not get impressions because Facebook can't optimize your ads.
Solution: Check the size of your custom audience in the audience manager and make sure your audience is large enough (usually at least a few hundred people to run your ads effectively).
2. Even though you've confirmed that your Pixel is receiving events correctly, there may still be an issue with how you set up your custom events or a problem with attaching the Pixel code to the correct pages.