It's an easy fix...Also, I'd rather not have a Toyota tech remove panels and tear up my interior searching for rattles....In my experience this never ends well and your left with even more vibrations and rattles...
Good luck...
This specific vibration / rattle fix (along with many other areas) was discussed over a year ago within this thread below...
Vibrations/Rattles in 2020 Premium Supra
And here is a video which shows how to resolve your specific issue (starting @ 2:16)
I had a '17 MX-5 RF GT....Was nimble and fun to drive in the twisties but gutless as hell....
I find my 3.0 Supra brings the best of both worlds together...both nimble and fast...
Both cars are sexy as hell, draw quite a bit of attention, and do seem to share similar design cues!
good luck!
Thanks! Yeah, I'm still stock...I'm just looking for a local Toyota dealership that actually has done oil changes on the Supra and uses the proper GR supra oil kit...