The organization seems fairly reputable but I can’t 100% confirm anything.

I never said they weren't reputable, they even allow signers to opt-out of being contacted. I will stand by my statement that organizations, both in political and social justice spaces, mainly use these petitions to attract new donors and volunteers.

But I don’t think petitions have to go through Canadian government website for it to be successful Its just the a more typical approach.

I guess it really depends on was you think qualifies as a "successful petition." IMHO, at best, it could lead to more people being engaged with Queer Momentum. Maybe there's a chance of media attention? I'm not sure what else can be achieved.

FYI, in 2023, an official petition on a similar topic got over 16K signatures.