Well the OP's post sent me on a quest to check out my iPad sleeve collection. Two strikes out of three

. I do have the Waterfield Air Caddy ordered.
My older Pad & Quill case, originally purchased for the 12" MacBook worked with my 2018 iPad Pro 12.9" with the original Apple Folios. With the new MK, nope. Well that was probably too much to ask. I'd check their line out. If they don't have something now. I know they will have something soon.
I also had an Esty purchase from Crazy Horse Craft "Handmade in Lithuania". Nope.
Finally my Vaja beautiful all leather case came through. This was an expensive purchase, but it is beautiful. I did buy it on sale months ago. So please don't let your eyes bug out when you see the current price. I do love it. That really would have been a hard hit if I had to pass it on.
The new 13" Zippered Leather Pouch is the perfect combination of functionality and style. Completely embraced with 100% Premium Leather, this authentic beauty will offer padded PROTECTION against accidental drops, scratches and bumps
www.vajacases.com