They make eco friendly single use grills.
Here I found one, kind of neat if you really do need something just for a night, but definitely pricey.
CASUSGRILL Instant One Hour Eco Friendly Biodegradable and Disposable Grill for On The Go https://www.amazon.com/dp/B07DQBB8QB/ref=cm_sw_r_cp_api_i_0ndwEbT63VHAD
This product has been somewhat successful. It is on amazon for example Typically sells for $20-$30. Kind of heavy from the use of rock.