I have a new in box ProClip Angled Mount for the Supra. Never installed and ended up selling the car.
This is only the clip as seen in the link. You will also need whatever compatible device holder you need.
$20 shipped to CONUS.
https://www.proclipusa.com/product/855595-angled-mount
Have a set AWE Foiler Wind Diffusers. They worked very well, but I ended up selling the car.
They were on the car for about a month and are in excellent condition. You will need to replace the adhesive.
$50 shipped to CONUS.
Looks like Stealth Hitch makes a receiver for the G29 Z4, curious if anyone has tried installing one on a Supra? It looks like everything is pretty close to the same, except the reverse light on the Supra might get in the way. Hard to find comparative parts diagrams between the Z4 and Supra...
Just picked up a '21 last week and today went to plug in my OBD reader, but the OBD port was completely AFK. The bracket is there, but the connector was gone. Pulled the dash apart and found the connector floating loose up there. Slid the connector back into the slot, but it still easily slips...