DOTSNET integrates perfectly with Unity.Physics, but you need to update your systems in just the right order.
DOTSNET comes with a safe ApplyPhysicsGroup. Every system that is updated in that group via [UpdateInGroup(typeof(ApplyPhysicsGroup))] is safe to apply physics.
Both our ServerActiveSimulationSystemGroup and ClientConnectedSimulationSystemGroup are part of ApplyPhysicsGroup automatically, so you don’t need to worry about anything if your systems update in those groups.