Anyone know why the Illrigger class is available to purchase but the class is not listed in character creation? Is this a known issue? I have the MCDM box checked on the character creation and yet the class isn't available during creation.

Why do people skip pinned threads?

The pinned thread "The Illrigger Revised - Issues and Support Thread" is the thread for Illrigger support issues and the first post has stuff you can do and check.

https://www.dndbeyond.com/forums/d-d-beyond-general/bugs-support/211010-the-illrigger-revised-issues-and-support-thread

And how does this help when one character is able to work with it being a Multiclass but the others you're trying to make don't seem to be able to work with it at all as a base class or multiclass?

Quote from Drakonar >>

And how does this help when one character is able to work with it being a Multiclass but the others you're trying to make don't seem to be able to work with it at all as a base class or multiclass?

 
You made this as a response to me but it has nothing to do with my post, or this thread even (the class not appearing, probably because OP didnt check entitlements were in sync, as suggested in Post 1 of the thread I linked to).. 

The thread I linked to has a list of known issues, stuff to check, etc in the first post. Start there and if it doesn't help then make a post in that thread.