This is actually a really fun question, I love digging into this stuff

So, to start off my opinions are my own and this is a/b/o so it's all for fun and completely unserious

That being said. I see dr43m as an omega because although he is the leader and takes charge, he also cares for them in a way that's like, he'll let them do/take whatever

Plus he's always so cozy, cat beanies, soft sweaters, his hair. Idk to me that screams omega

And ngl, I love role reversal. So him being that much taller and broader than the other but being the omega, i fucking love that idea
Also for as much as dr43m is protective, he's soft in how he does it, he protects the way I imagine an omega protects in their nest