Good that you mention it. I will add contact details.
It has been a while so I don't remember the exact wording. I wouldn't use the same wording since it is not a petition and doesn't add value. They want to research if it is an unfair practice. In my opinion banking and wireless payments is a common good. Having two companies, who only approve software of partners, most of them including unremovable spyware, is limiting on access to banking and privacy (although privacy is another department). I mentioned security since that is Google's argument for the block even though GrapheneOS is more secure than approved builds. I gave the number of GrapheneOS users to make clear it doesn't affect only a few individuals. I think LineageOS users might also be affected?