Yes, certainly. The egg white powder is pasteurized and can therefore be consumed without being cooked. The process reaches sufficient temperatures to also inactivate avidin.

Avidin in egg whites binds to biotin and prevents its absorption. If you occasionally consume raw egg whites, there's no problem, but if you consume them often, it risks leading to a biotin deficiency. Normal cooking of eggs (fully coagulated egg whites) is generally considered sufficient to eliminate the nutritional risk associated with avidin.