Yes it should work with the codec pack, and they're keeping it on some of their laptops like with dedicated gpus
Individual buyers can just buy the HEVC license from the Windows store. I think windows even opens the store, if the codec is missing. A lot of companies disable the public App Store on their MDM though.
If missing licenses impact end users on a larger scale, it's also a communication issue from the manufacturers. This won't do them any good, as customers will be annoyed from the bad user experience. Even if one in 100 customers switches the brand, they make a loss.