For anyone else who was wondering, the 2 in LGBTQ2 apparently stands for "two-spirit", which is:

a term used to broadly capture concepts traditional to many Indigenous cultures. It is a culturally-specific identity used by some Indigenous people to indicate a person whose gender identity, spiritual identity and/or sexual orientation comprises both male and female spirits.

First time I've ever heard of either term, but I'm not Canadian!

https://www.canada.ca/en/women-gender-equality/free-to-be-me/2slgbtqi-plus-glossary.html