As far as I know, there’s no specific button or action to trigger iCloud sync. I haven't notice issues, but I use the mobile Obsidian app much less frequently. It always seems updated to me.
This [source](https://help.noteplan.co/article/86-how-to-force-sync) says that opening the iCloud Drive on Finder will trigger sync. On the mobile Obsidian app, you can flicker the page down to download updated data, obviously it will only work if the more recent data was uploaded.
This [source](https://help.noteplan.co/article/86-how-to-force-sync) says that opening the iCloud Drive on Finder will trigger sync. On the mobile Obsidian app, you can flicker the page down to download updated data, obviously it will only work if the more recent data was uploaded.