Girls, can you tell me how to understand that the baby has hypotonia? …

Girls, can you tell me how to understand that the baby has hypotonia? He is 1.5 months old, we went to a neurologist and everything was normal, but now he often tilts his head sideways and when I lay him on his belly, he holds his left side well, but his right side collapses and he always keeps his head in that direction. Our doctors are not close by, so I'm thinking of going to another one?