Trade a brand new car in for another one because some cut a cat off? Don’t see how you could come ahead on that…
The way the market is going, if he can at least break even, I'd say it's an option worth considering. The downside is he will have to sacrifice a couple of months (at least) waiting for a new '22 to arrive from Japan.
I sold my 2-year old 2019 Tacoma TRD Off-Road 2 months ago, with 18,000+ miles, and netted $6k. I basically owned it for 2 years for the price of a 1-year lease. I then saw it sold on Carvana for around $8k over the sticker price I paid 2 years ago. Someone actually bought my Tacoma for $46k! That sale helped me put down $10k on my brand new '22 GX 460 Premium. There are other members on CL with similar stories, turning in their leases on GX or RX early to get the new '22 GX and came out unscathed. I know it's hard to believe because we're so used to seeing vehicles depreciate the moment we drive it off the lot, but at the very least, OP can explore that option and if it makes sense for him. If not, he can just turn it down. It all depends on the equity he has on it, the shortage vs. the demand on the GX currently, etc. It can't hurt to consider.