Teslas still use ATF for the gearbox, G-40 coolant for their electronics(same ish as BMW and Mercedes) and brake fluid. Dex-VI and Dex-Cool is still a fact of life on the Bolt, as a matter of fact, GM only wants pre-mixed Dex-Cool to be used, mixed with deionized water(I’m sure Prestone Cor-Guard can be used too).
Toyota on the Mirai wants an exotic coolant that must be mixed with DI water at the point of service. I forget the P/N but it’s $200-300 for the kit. That coolant is for the fuel cell stack. The inverter/hybrid drive takes pink SLLC and ATF WS.
I don’t blame Tesla for only wanting their people to touch their cars - too many hacks and sub-par parts out there. But Right to Repair should be a thing regardless.