on lightning the only option at the moment is using hodl invoices for escrow. otherwise onchain you can use multi-sig or DLCs. there is a project in this tournament that yalls could check out though!

https://bolt.fun/story/why-do-we-need-a-bounty-adjudicator-fairness-and-efficiency--1172

https://bolt.fun/story/meet-the-team--1125