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The growing medium looks kind of dry. Banana needs a lot of water during the growing season, especially a baby one which has been removed from the mother plant.

Note though that dormant banana needs to be kept on a dry side.

Where do you live? What is the current climate and temperatures?

I agree, it does look dry. Look for aphids on the stem and in the leaf axils.

Put out ant bait to control ants. I usually wash the stem and leaf axils with water to wash off aphids every time I water. Bananas can be very sensitive to insect sprays. I have used insecticidal soap.

If there are symptoms of bunchy top, it cannot be saved. It will need to be destroyed and buried at least 18 inches deep or burned.

https://www.pestnet.org/fact_sheets/banana_aphid_103.htm