We watered our Yucca too much and now there is white powdery stuff growing in the soil where the Yucca is planted. Can we get away with scooping it out, or do we need to completely repot the plant? Honestly we have no idea what we’re doing with this plant guys. Tell me straight, how bad is it? Can it be saved?? Yucca dying :/
Looks more like Dracaena fragrans 'Massangeana', or corn plant. This is a plant that can tolerate some drought, so yes, you are overwatering. Here's a how-to guide re: watering regime / soil: How to Take Care of Dracaena Massangeana Plants