It's fused.
You'd have to separate the glass via a heat gun, while trying not to break the digitizer. Then remove the glue. Then adhere the new glass to the digitizer with loca adhesive. Loca is hard to deal with, bubbles, and can get into other components ruining them. It must be cured with a uv light. And even if you can pull it off, no way will it be 100%. Strange glares, etc. Some try to do it with double sided tape, but that leaves a gap between the glass and digitizer, which causes strange touch responses or it'll be totally unresponsive. And be prone to break the glass easily without loca.