Neck, shoulders, triceps, even his forearms are thicker. He has always had a good fend, so this should make it even better.
Just comparing Sloan and Turuva (too lazy today to get others) -
Tyrell Sloan: Weight 93kgs and Height 185cm (6ft 1 in) and age 22
Sunia Turuva: 88kgs and 181cm and 22
Both still much less in terms of weight and height from a lot of other wingers but Sloan has now grown and should be able able to compete quite well on the wing when you compare his details against Turuva who is a pocket dynamo and did wll at the Panthers.
Tyrell will muscle up a lot more this preseason. Last preseason he got injured in the Koori Knockout Comp and was not able to go into training under Flanno and the other coaches and Fitness staff so in a way he was a bit under done for 2024. Next year though, he will be stronger and tougher and fitter.