I’m working on a new mower too, trying to utilize a relatively new module, UM982 from unicore that has GPS YAW built-in. However, I’m facing some issues as described in Building a rover/mower, UM982 GPS RTK inaccuracy
Now, I’m not sure if going for a newly released hardware, UM982 in this case, is a good choice. It seems the route using ZED-F9P has been well proven.