Welcome to the forum! Consider making a post in ‘Introductions’ and showing us your snakes. Most of the people on here are BP keepers so you’re in luck.
You can’t ID a single-copy Mack Snow after it’s shed a few times. So all you can say is that you have several Rainwater Albinos that might be Mack Snow or not, and one leo that is confirmed het for Rainwater that might be a Mack Snow.
Make sure you put the pairing in the ads for each & make it clear that you aren’t familiar enough with leopard gecko morphs to reliably ID them yourself, and then you shouldn’t have any problems. No one can complain if you are forthright about being out of your element and not sure of what you have.
But yeah you’re totally right, ID request posts aren’t anyone’s fave.