The latest info I have for the Tundra is 2017, but the P255/70R18 112T tires came standard on the Tundra SR w/ steel wheels and the Tundra SR5 w/ steel wheels.
The Maximum Load Limit for the P255/70R18 112T tire is 2469 lbs @ 35psi. This is too low for use on the LC200 which requires Load Limit for P-Metric tires of 2513 lbs.
However, BFG does offer a KO2 in LT255/70R18 Load Range D (see here on TireRack:
BFG KO2 LT255/70R18D) when inflated to a RCTIP
47psi does provide the required Load Limit for the LC200.
So... if the tire is LT255/70R18 then it could be used on a LC200, but P-Metric P255/70R18 and ISO-Metric 255/70R18 tires would not be suitable.
FYI
HTH