Happy to help! There are two types of magic eyes: parallel and cross view. I think the former is more common so a lot of the ones you stumbled across probably were made so that letting your eyes drift made the image pop out.

This image is the cross view variant where you have to cross your eyes to get out to pop out.

If anyone is trying to figure out the difference, check this image I shamelessly ripped from Reddit

This one is parallel view where you can get the image by letting your eyes drift:

While this one is cross view where you have to cross them:

Once you figure out both you’ll be able to get any flavor of magic eye by doing both