I would really like to see Samsung make their phone a little thicker with a much bigger battery in it. I think that putting a 5500mAH is a waste of time. I think a 10000mAH would be much better. Then you could go a week before charging. Making the phone abit thicker then could put better camera system in. There is a young girl back in 2013 who was able to charge a phone in 20 to 30 sec. So the tech is out there.
A 5500mAH battery weighs approximately 3 ounces, and a Galaxy S23 Ultra weighs about 8.25 ounces. Doubling the size of the battery, could increase the weight by around 35%.
The 18 year old girl who invented this "Battery Supercharger", was able to do what you said.. but I'm guessing that it wasn't economically viable, or there were other issues.. possibly charging that fast, would create too much heat, and cause reliability issues?
