My best guess is for an outdoor mini incinerator. It looks like the dimensions are around 12x12 so something like this would fit.
Happyyami 1 Set Metal Garden Incinerator Fire Bin Burning Leaves Barrel Stainless Steel Burn Barrel Incinerator Furnace Burning Bin for Yard Garden https://www.amazon.com/dp/B08TZRHTJ4/ref=cm_sw_r_cp_api_i_23GVSCPGH5N11MKZ8ABQ