For WB: ANBU Mission Desk (Naruto (No Boruto)) and WB: ANBU Mission Desk (Naruto) — as far as I'm aware* canon has no information on how missions are given to ANBU and definitely doesn't specifically show a mission desk for them the way we see a mission desk for non-ANBU ninja. A better tag would be "WB: ANBU Mission Assignment" to not box folks who want to offer this into having to go with having a mission desk.

(*I haven't actually seen Boruto myself but it hasn't had any ANBU stuff, as far as I've heard? Definitely this all goes for the Naruto (No Boruto) fandom, though.)