I can't think of any (except some accounts of people playing solo games in the same space, but not necessarily intertwining their stories) - but solo-together is a really fascinating idea! Please reply here or to the original post if you have recs, I'll follow both!
I’m interested in finding “solo-together” TTRPGs that have multiple participants each playing the same solo game but the stories they are creating combine at the end for a group finale. The example I can offer is Meet Me at the Tavern. Have any suggestions?