Heat Pump Defrost Question

https://kameronwxui360.terracolumn.com/posts/attic-heat-and-ductwork-problems-behind-ac-repair-in-north-fort-worth-explained-by-comfort-experts

Heat Pump Defrost Question Is it normal for a heat pump to blow steam from the outdoor unit in winter? Ours did that during the freeze last February and I panicked a bit. Sounds like it might just be the defrost cycle from what I'm reading here