They've slowly been moving towards an "apple like" walled garden, so wouldn't surprise me.

Remember Postmarketos also works on many older phones.

The way to control mobile communication is to lock down the devices to a locked down system, eg. Only authorised devices can connect to the system & make calls & access the internet.

For several years, an alternative internet has been in development. The internet has always been free, the biggest hurdle has always been the connection!