Hi. I have a Phone 3a, and I bought it in Japan. As the support site says, Nothing Phones don’t support eSIMs…except the Japan model.
Nothing Phone (3a) Product Feature
Does the Phone support eSIM?
The Phone supports eSIM only in versions sold in Japan.
This is not actually true. The Japanese models only support eSIMs for use in Japan. I recently travelled outside Japan and was planning to use Nomad again as an eSIM, and was told by the app my phone did not support eSIMs.
This is not a disaster, but I think this information is quite misleading.