The values of the properties of the Strix Movement Synchronizer are assumed to be fixed during the development and not changed during the runtime. However, you can change them on the fly if necessary.
In Strix Unreal SDK, properties of Strix Movement Synchronizer are synchronized, so those of replicas are changed when you change property values of Strix Movement Synchronizer of the owner (the original Actor). On the other hand, if you change the property values on a replica, they are not reflected to the owner. You should always change property values on the owner.