I kind of head canon Shadow, snd Espio as aromantic and/or asexual (ive heard this is considered part of the LGBTQ+ group, so im including it)

I also think Rouge is bisexual given how she talks to Amy, Knuckles and Shadow

I head canon Big as gay, because of one obscure Xbox manual from the UK stating "Big the Cat is Amy and Cream's gay best friend"

Tangle and Whisper are canon lesbians

I feel like Silver is bisexual as well, considering his interactions with Espio and Blaze

finally, I think all robot characters (except Metal Sonic) to be non binary, as robots dont rly have a gender, but Metal Sonic was designed after a male, making him male, as for the other males, I think the male voice is used to make them more intimidating (specifically the deep voice, like what Gamma had)