There is a bug in thr recent release that does not always assign ownership to freshly created rooms. I have an issue marked for this that i'll be addressing this weekend to resolve.
nostr:npub1yx6pjypd4r7qh2gysjhvjd9l2km6hnm4amdnjyjw3467fy05rf0qfp7kza How do I edit a cornychat room once I created it?
Discussion
You may need to refresh the page and then access room settings for the room by clicking three dots on nav bar at bottom