The presence of visual thumbnails in your screenshots is a very positive sign, as it confirms that your note data still exists on Apple's servers. These previews are generated from the actual content of the note, meaning the information is safe in the cloud but hasn't fully transferred to your device yet. The empty body content inside the notes indicates that your iPad is currently in the middle of a massive resyncing process after the settings were toggled.
The time required to fully resync over 100 notes varies significantly based on your internet speed and the size of your attachments. Standard text-heavy notes may only take a few hours to appear on a high-speed Wi-Fi connection. However, if your notes contain many images, PDFs, or handwritten data—which is common for "Lab DNA" or "Biology" studying—it could take up to 12 hours or even several days to rebuild the entire local database.
To prioritize the download and prevent it from stalling, you should keep the Notes app open in the foreground, as background syncing can be throttled by the system to save power. It is also essential to keep your iPad plugged into a power source, as syncing often pauses when the device is on battery or in Low Power Mode. If the progress seems stuck, try creating a small "Test" note on the iPad to nudge the system into fetching the rest of the pending data.
If you need to access an important note immediately, you can log in to iCloud.com/notes on a computer browser to view the content directly from the server without waiting for the iPad to finish its queue. Crucially, you must avoid toggling the "Sync this iPad" switch again or signing out of iCloud during this process. Doing so would reset the download queue from the beginning and could lead to further data confusion or synchronization errors.