Personally I prefer to use Samsung Cloud to move most of my content from one phone to another apart from my apps.
I move these by going into MyLibrary section in the Playstore to get those.
I'm not sure why Smartswitch isn't playing ball @Sargan
Is everything selected to move across.
I wish you all the best with this.
Daily Driver > Samsung Galaxy s²³ Ultra 512Gb in Phantom Black.The advice I offer is my own and does not represent Samsung’s position. I'm here to help. " This is the way. "