Wording's a little confusing but from what I can make out, to see what is compatible red dot to magnifier, you have to just know what it is you're after and the type.
If you look online most magnifier will be for Eotechs, others for aimpoint red dots, and then some "might" work with other sights but are best for the previously listed.
Just look at the image and if it looks like the one used (perhaps in a google image search) as ones people use with the preferred sight of your choice, then go for it.