If you are using SplitView - tweaking navigationSplitColumnWidth with +1/-1 width can drastically change how it behaves on #iPhoneDuo. I ended up customizing based on container size for ideal behavior in partially open, open, portrait-open modes.
Apple platforms dev, BG3 modding, my dog, photography etc. Working on @benkyobox.bsky.social, a simple but powerful memorization app: benkyobox.app Other: linktr.ee/juanarzola