If I go by the most similar reference I found in digitec, it's this one: Lenovo IdeaPad Gaming 3 RTX 3050 Ti (15.60", AMD Ryzen 7 6800H, 16 GB, 512 GB, CH)

Unfortunately, you won't be able to add an extra 16Gb of RAM.

As long as the laptop has DDR5 RAM installed, yes.
Anything less is not supported. Just pay attention to the MHz, there are different speeds