Folders & Files on PC but iPad and iPhone show only folders

Things I have tried

Setting up Obsidian. I’ve been adding folders and files on my PC. When I added the app to my iPhone and iPad, then synced, they show the folders, but not the files in the folders.

I searched Help, but no exact issues like mine.

Thanks

What I’m trying to do

What kind of files, and what are you using to sync?