Yeah...
The reasons why the Toyota 7, Toyota 88C-V, and others aren't in Gran Turismo 7's base game:
-Gran Turismo 5 and Gran Turismo 6 received a bit negative receptions for having PS2 and PSP model cars.
-It takes 6 months for Polyphony Digital to model one car, so ModelingCafe and IZMO Ltd. joined Polyphony Digital in 2018.
-The shaft to 4K-capable consoles meant that a lot of previous car and track models had to be cut. This is why old models cannot work on new systems.
-Polyphony Digital, ModelingCafe, and IZMO Ltd. limited their time of modeling cars and tracks because of the COVID-19 pandemic.