>Unfortunately you can’t force a company to use another companies technology

Ignoring that we can do exactly that...

Something we can do without doing that is to require that if the car is sold with a physical capability, that capability must be enabled without additional fees being required.

Another option is to require that if the car is sold with a software integration feature, it must include integration with an open standard.

The third option, "force them to support someone else's software" is to mandate that if the car has any connectivity features, it must support connectivity with all devices having over a certain percentage of market share or raw number user base.