Huawei should just make their own car or try to cultivate a relation with one or two dedicated car companies, even if they have to finance them.
Google also only had one or two phone companies use Android when they started out.
At this point, Huawei's brand name in the auto industry is already tarnished due to stupid statements in the past and the wishy washy attitude with the AITO cooperation.
Carmakers dislike Huawei because they want to take over everything, including the drivetrain which is the core technology of a car. There's also the fear of sanctions resulting in your whole car being unsellable overseas without huge changes.
Customers no longer understand the appeal of Huawei tech, they basically view it as just installing a Matepad on the dashboard which means there's no real reason to choose it over a non-Huawei involved car
Huawei's best bets for the future would be to exit the drivetrain part entirely and focus on:
-creating a fully domesticized ADAS solution including the algorithms, LIDAR/cameras, steering control, brake control
-expanding Hicar so that all Androids can use it
-voice control solution including algorithms, interior motor/lighting control
These areas (heavy software) are the areas that traditional automakers aren't worried about since they're usually outsourced anyway (and plug and play so they can be easily replaced/removed in case of sanctions).
And customers can easily understand the product and want it in their car (eg Hicar is much loved because of how much smoother it is compared to Android Auto / Baidu Carlife)
As for more commoditized parts like 5G chips, auto chips, infotainment unit, power electronics, they can simply be another supplier in the sea of suppliers without all the hoohaa about Huawei inside
