I received the steam pot today! After two failed purchases with steamers, I think this is the best choice since it doesn't have any electronic parts that can break, etc.
It has three small pots, one unfortunately arrived dented but it doesn't matter since the other two are more than enough for a meal!
I filled it with 3.5 liters of water and after almost 50 minutes of cooking, there was still plenty left, so no matter how long you leave it, you won't need to add more water!
The materials seem good, now time will tell, I will come back with an update.
I should note that the induction hob I used was the well-known Esperanza EKH011 with a cooking surface diameter from 12 to 20 cm and everything went well, I didn't know if it would be suitable for the surface.
At the sink, it needed a bit of force where I had the turkey breast piece, but overall everything was fine and the food turned out great.
So, the small pots have a large capacity, you won't need to add water, and don't worry about the diameter. I’m leaving photos and will return...