Nothing close to that, the table is under a pavilion and basically always shaded, so magnifying glass had nothing to do with this.
I do wonder if it was an act of sheer vandalism, or perhaps a completely ignorant person trying to cook food on the table. 🤔
Yes, the burn spot is about as big as a pot...
Edit: Shit, look at the more distant ring around it. I do think someone was cooking in a pot or pan on that table.