I don't see Jazzy winning. From the vid above there doesn't seem to be much power in Jazzy's punches and her ground game looks very rudimentary.
The huge problem for anyone facing Gabi is that she has a very legit grappling game. I first saw her when she was training at Marcelos a few years ago, and she rolled a lot with Marcelo. Marcelo of course handled her easily but she has legit skills.
(For reference, she looked nothing like today as I didn't even recognize her in Rizin initially...some strong chemical assistance has been added.)
Gabi's striking is pretty low level, though improving each time, so a strong striker could take Gabi out but then she could/should just go into takedown mode to negate that.
I don't realistically see anyone beating Gabi anytime soon, unless they have been training 5+ years at a strong MMA school or just get a lucky KO punch in. Jazzy looks more qualified than the Grandma but I don't see her beating Gabi.