I don’t know if this is a stretch but I just finished watching the episode and when I clicked off I looked at the menu for doctor who and the dates for it showed that it ended. It said 2024-2025! Usually that indicates a series is over and there won’t be anymore. Maybe this series is ending and they are going to continue with the 14th doctor and the 15th doctor coming back together and then having the 16th doctor be back on bbc. Just an idea though