i am in a similar situation with seedlings
the one in the 3rd pic look like one i have which i was guessing might be musa thomsonii
just a guess though as i am unsure myself
i did have the balbisiana var balbisiana labelled correctly though
i have a pic of one here:
subsonicdrone's 2021 thread
the ones i thought were thomsonii are the ones with the red underside to the leafs