imo SMURF is the only and best small one. besides tokens.com there is LQAVF, which owns Oasis Digital Studios, a wholly owned subsidiary, and signed an agreement to be the exclusive agency for the sale of virtual land and items in Aftermath Islands, a metaverse currently under development ahead of launch in mid 2022.
Otherwise the stocks I know of are large cap; RBLX U VRAR FSLY MTTR
VRAR is also pretty small market cap that I like. They actually own about 10 companies