Definitely a cockatoo of some sort, seeing the crest/head plumage would help identify it. They are very personable with training or being accustomed to being handled and will wear clothing.
These birds and other parrots can suffer from a potentially lethal disease (Psittacine circoviral disease) which in part renders them featherless, so people knit little jumpers and coats for them to keep them warm.
My heart his little rain coat with a hoodie 🫠💓