Is a 2-prong plug item plugged into a 3-prong surge protector and wall outlet still protected?
The surge protector will dump high voltage spikes from hot to the ground and many will drop from hot to neutral, so it would depend on the model, if internally the mov’s or metal oxide varistors are wired hot to neutral you would still have spike protection. If only wired got to ground it will do no good as their is no connection.