Borbin the 🐱

A tilt lens change the focal plane, and this is impossible to do with transforms in Software¹. Hardware required.
To get a Tilt lens for Nikon Z leaves you only to a few choices.

Use Nikon F mount Tilt(-Shift) lenses with the FTZ adapter:

• Nikon PC NIKKOR 19mm f/4E ED Tilt-Shift Lens $3,396
• Nikon PC-E NIKKOR 24mm f/3.5D ED Tilt-Shift Lens $2,196
• Nikon PC-E Micro-NIKKOR 45mm f/2.8D ED Tilt-Shift Lens $2,046
• Nikon PC-E Micro-NIKKOR 85mm f/2.8D Tilt-Shift Lens $1,976
• Samyang 24mm f/3.5 ED AS UMC Tilt-Shift Lens $669

Nikon hasn't released any Tilt(-Shift) lenses for Z yet, so this leaves you currently only to:

• TTArtisan Tilt 50mm f/1.4 Lens $199
• TTArtisan 100mm f/2.8 Tilt-Shift Macro Lens $389

The 50mm is not the best quality with its standard double gauss design, and who needs a 100mm Tilt lens?

The idea is to use a Tilt adapter F to Z mount, and use your favorite F mount lens (image circle of a Tilt-Shift lens is larger, but here it is used along with a DX sensor, so this will be an advantage; cannot check for FX).
The popular NYC store does not have such an adapter, but the Kipon company store has one: Tilt Adapter for Nikon F Mount Lens on Nikon Z Mirrorless Camera.
The site lists items to be shipped within 1 business day, but as I have learned from the customer service, the item is shipped from somewhere in China first to another warehouse, and then from there to the customer. This translates to a 2-3 week shipping.

The alternative is to use a Sony E to Z mount tilt adapter, or a Fujifilm X to Z mount tilt adapter with an additional lens adapter as the 16mm flange distance of the Z mount is a bit shorter than the Sony (18mm) or Fujifilm (17.7mm) one².

The Kipon F to Z mount tilt adapter arrived:

Feels solid and high quality. Tilting is smooth and has good friction to hold a lens even without using the locking.

The adapter has a max tilt of 12° and can be rotated 360° with 30° click stops. The smaller plunger on the right side is to unlock the click stops during rotate.

For the test, a Voigtländer 58mm f/1.4 SL lens is used:

It really works.

Shelf without tilt:

Shelf with max tilt:

Shelf from an angle without tilt:

Shelf from an angle with max tilt:

Examples with max tilt:

The shift feature of the Tilt-Shift lenses is of little interest as the projection is only a geometric transform in post op. The panorama tools easily take care of this with vertical control points (t2). You can never align the lens that perfect.