I originally thought it was an excessive amount of letters to describe those of us under the rainbow but no, it makes more sense in the context of the article I do not really agree with combining the two but to each their own I guess.
MMIWG2SLGBTQQIA+ stands for missing and murdered Indigenous women, girls, two-spirit, lesbian, gay, bisexual, transgender, queer, questioning, intersex and asexual+. It’s derived in part from the more commonly used initialisms MMIWG (missing and murdered Indigenous women and girls) and 2SLGBTQ+.
Since you’re alive enough to post here, I don’t think you’re from that community. Note the first three letters are for “missing and murdered Indigenous”, and the rest are modifiers from that. As I understand, Leah Gazan is using this initialism as an expansion of “MMIWG”, not as an expansion of “LGBTQ+”. She is highlighting that the “ongoing genocide” she refers to is not solely of Indigenous women and girls, but also of gender-diverse Indigenous people.