I've never used either of those tools so it took me a minute, but I think I understand what you're doing?
Are you using Nano Banana to create a 2D image that just looks like a rendered 3D model, and then using Meshy to create an actual model from that? If so, that's a pretty clever approach that I probably wouldn't have thought of.
Judging from that Dalton pic it looks like it gives you a pretty decent roughed out shape to start with, but still requires a fair bit of work on your end. Mostly lets you skip the "blocking out" part, I guess.
