It’s not a great camera for ultrawide lenses, except insofar as the rollfilm backs offer excellent film flatness. Once you’re inside the box, there isn’t much room for applying any camera movements, and even back movements won’t get you much of an advantage over simply stopping down the lens for more DOF.
I have a Tech V 23b and a Tech V 4x5. The widest lens I use on the 23 is 55mm. I occasionally use a 47mm lens with a helical mount on the 4x5”, and if I want a medium format image, I’ll use a rollfilm back on the 4x5” camera, but I only use the 47mm on the Tech V, because I use the Tech V mainly with other lenses, and having an ultrawide in the bag gives me another option. If I wanted a dedicated ultrawide 4x5” camera, I’d probably look for something else. Sometimes, if I’m shooting the 2x3 Technika and want the option of going wider than my 55mm lens, I’ll bring a Noblex 120.