Wish doesn’t show up. 

This is known and detailed in the Tash's Cauldron of Everything support thread

WARLOCK
Optional Spells. Gate & Weird spells are not showing as being available for the Mystic Arcanum feature.

Davedamon, Gate and Weird are not Wish.

My apologies, I completely missed that Wish hadn't been added to that list as it is something that is known. I'll pass it along to get that text updated. Sorry for the confusion

Any chance this will get fixed soon? it may just be on my end, but i am still unable to select wish. 

Quote from Dynalus >>

Any chance this will get fixed soon? it may just be on my end, but i am still unable to select wish. 

Davyd already linked the Tasha's Support Thread - and if that doesn't have an update then there's no update. The DNDBeyond team don't give out ETA's for anything.

To be fair it's now November, I'm sure if it was brought up on social media it would be fixed asap

It's still not fixed and has been noticed over a year ago.

Still not fixed.  I just hit level 17.  I was looking forward to putting wish on my list.

Still missing, hopefully it gets fixed before I hit 17...

Quote from Doc_Sunshine >>

Still missing, hopefully it gets fixed before I hit 17...

It will not happen. My recommended workaround is to just ask your DM to let you have the Ring of Three Wishes and just use it in accordance with your subclass. That is what we did in the campaign I was in.