I'm one of those people that corrects paper forms asking for 'gender' to 'sex', and I routinely drop out of any kind of online questionnaire or survey asking if my gender is female. I've been part of the ONS Coronavirus study since it started in the pandemic, and just logged my first test result in its new phase - and they asked my sex! And there were only two options! Not 'sex assigned at birth', and no follow up asking if my gender identity is the same as my sex assigned at birth - no, the scientists just want to know what sex I am, because that's the meaningful data they need, and they don't feel the need to validate anyone. Bravo to the ONS! (on this occasion)
I do find it ironic that the 'Covid Infection Study' abbreviates to 'CIS' 😂