You can change the Rover tires to different compound (toughness) and thread easily. Just source for standard 1/10 RC-car tires of a certain specifications listed below.
Inner rim diameter: 2.8"
Outer diameter: ~ 125 mm
Width: ~ 70 mm
Typically described as for 1/10 scale Monster Truck RC vehicles
You can always look for different outer diameter tires, but it will change the Rover speed and force (slope/climbing ability). You can as well find different rubber compounds: softer or tougher ones. Keep in mind that softer compounds will affect the Rover turning resistance, but on the other hand will help climbing obstacles.
Higher outer diameter = higer speed & lower force
Lower outer diameter = lower speed & higher force
It's always a matter of compromise.
Stock tires of Leo Rover are similar to these: https://www.aliexpress.com/i/32735892787.html
For ex. you can look for tires to switch to here: https://www.rcplanet.com/1-10-monster-truck-tires/