I don't know why you were downvoted, but this is a good idea. I recently read an article about how Canada is the first country to provide an option for trans and nonbinary people in the census, and Quebec could definitely do something similar.

Beginning in 2021, the precision of "at birth" was added to the sex question on the census questionnaire, and a new question on gender was included. As a result, the historical continuity of information on sex was maintained while allowing all cisgender, transgender and non-binary individuals to report their gender.

https://www150.statcan.gc.ca/n1/daily-quotidien/220427/dq220427b-eng.htm