“Sacred texts give no specific depiction of God, “
So YOU thought that you would? Got it. Schmuck.
Plenty of Old and New Testament texts describe the appearance of angels as “men” or “young men.” (Never women - not even a feminine pronoun - or children, in spite of artwork from the Renaissance to today.)
No such description is given in the narrative of Moses and the burning bush. A reasonable reader would conclude that there was no apparition in human form at this event, only the fire that signaled God’s presence.