You can't do anything with respect to legislators. In their eyes, your privacy and the consumer's rights are less important than some grandma, who lost a large sum of money by installing malware after ignoring multiple warnings.

If you want to make a difference, try to communicate with someone from OEM companies. Google is making their phones inferior and they'll loose money and market share because of it.

After this change, "I can install NewPipe and Ad blockers" will become a major selling point for Chinese phones among large and profitable segments of the population. And that high-end manufacturers might as well give up and let Apple take that part of the market. If OEMs can be made to understand that, that's going to be the end of this initiative.