>>106451182
NTA, but it has Gemini's watermark on the lower right (greyish four points star). Not really sure if it's possible to determine whether it's Imagen4 or Nano Banana, but I *think* Gemini is still using Imagen4 for txt2img and NanoBanana only for edits, but I'm not 100% sure about it. Their "what Gemini can do" page about image generation mentions both:
https://gemini.google/overview/image-generation/