Yes. Green bananas contain more resistant starch which digests down more slowly and lessens the insulin spike. If you can stomach it, there are also benefits to it in acting as a prebiotic for your good bacteria.
GEt a blood sugar meter and test to find out for yourself, easily available on amazon
Also green bannanas are high in resistant starch which is a very powerful prebiotic and great for your digestion
https://www.healthline.com/nutrition/green-bananas-good-or-bad#benefits-for-digestive-health
Unless you’re a diabetic I wouldn’t worry about that too much. As bananas ripen, yes, the sugar content does increase. Therefore, the likelihood of it spiking your insulin further is also increased.
However, if you’re focusing on insulin release, the glycemic index (GI) of a ripe banana is considered ‘low’ (some databases say approx. 48), so little to worry about if you are aiming to avoid huge fluctuations on blood sugar. Unripe (green) bananas fall lower on this scale.
There is a paper looking at the benefits of green bananas that could be worth a read if you wanted to delve further into this topic.
PMID: 31146437