This year we had a pretty hard freeze. Now my sago has mostly brown and brown/green leaves.
Certified GKH Gardening Expert
You can cut off the brown fronds, as these are dead. However, do not cut any of the green, as they won't regrow. This article may help you with getting them to recover: https://www.gardeningknowhow.com/plant-problems/environmental/tips-for-saving-cold-damaged-plants.htm