[Bears Armed]

Zamastan says, “the territory should more or less be the same in terms of longitude and latitude where UNE is concerned,” so that seems like good news!

They also say that the red line E-W across the middle of the map is the Equator: if your nation is still around the same longitudes south as was previously [presumed to be] the case, and the map's scale works the same on both sides of the Equator, then that would place everywhere on the map close enough to the equator to be within the tropics!
:o

Personally, I'm going to claim a bit of the new map for Bears Armed but that will explicitly be as an "extradimesnsional" extension while the original nation itself remains on a version of the old map where it stil has its previous [presumed] coordinates -- and at least some of its previous neighbours, which are written into its history, as well -- instead.

I know you mentioned bananas - can we have the Blue Java kind?

https://en.m.wikipedia.org/wiki/Blue_Java_banana

Probably.
Looking at the parts of the world where they grow in RL, and the "cold-tolerant" aspect, I think that they must be adapted for 'tropical mountain rainforest', but you've got a strip of that ecotype along the eastern slopes so it should be possible to grow them there.