According to the search results, the fate of Reynolds in Queen Charlotte: A Bridgerton Story is not explicitly shown in the final scenes of the series. However, there are some theories and hints about what might have happened to him. In an interview with Vulture, Hugh Sachs, who plays an older Brimsley, revealed that Reynolds and Brimsley split up and could not stay together. Sachs also mentioned that there was a deleted scene where he was going to meet the older Reynolds, who was the love of his life, but they could not be together due to the world they inhabited. Julia Quinn, the author of the Bridgerton series, has expressed her desire for Reynolds to be a secret duke, and she thinks that he is so "duke-y". Some of the actors who played Reynolds and Brimsley have also joked about where Reynolds might be, with one suggesting that he is on holiday in the Maldives and the other arguing that he is in Barbados. In conclusion, while the series does not provide a clear answer to what happened to Reynolds, there are some hints and theories that suggest he and Brimsley could not stay together due to the world they lived in.