Thanks for your reply. Yes it appears that currently, the only way is to export an FBX and then jump into blender and export from there. Blender uses NLA layers and the different animations stick when exporting GLB's.
Unfortunately, my final output needs to be .glb for a webAR project. I was hoping it would be something that I can do from within one application vs adding more processes to the workflow pipeline. From my research now, it appears that it's something that the Kronos group would have to update vs Maxon.