Can system data be cleared????

I would ignore that because this system data will make room when you need more space on your iPhone. These are some cache and temporary files that will be erased by the system whenever you try to save more files.

You may --> Clear Other storage on your iPhone or iPad - Apple Support (IN)

Some amount of system data is inevitable - it's used by the OS and cannot be completely eliminated.

What's missing in your post is how much data is used by 'System Data', to know if it's an unreasonable, or expected amount.

Now the question is what is "Other" storage. Read on...

• Other: Non-removable mobile assets, like Siri voices, fonts, dictionaries, non-removable logs and caches, Spotlight index, and system data, such as Keychain and CloudKit Database. Cached files can't be deleted by the system.
• System: Space taken by the operating system. This can vary based on your device and model.

About cached files in "Other"

Finder and iTunes categorize cached music, videos, and photos as Other instead of actual songs, videos, or photos. Cached files are created when you stream or view content like music, videos, and photos. When you stream music or video, that content is stored as cached files on your device so you can quickly access it again.

Your device automatically removes cached files and temporary files when your device needs more space.

If storage on your device differs from what you see in Finder or iTunes

Since Finder and iTunes categorize cached files as Other, reported usage for Music or Videos might differ. To view usage on your device, go to Settings > General > [Device] Storage.

If you want to delete the cached files from your device

Your device automatically deletes cached files and temporary files when it needs more space. You don't need to delete them yourself.

Every time you reset your iPhone, storage data is reserved so the phone can function correctly and improve your overall user experience. Every time you reset, you will receive a different amount of data. It also depends on what iOS you are using, newer versions can be more storage dependent.

To clear cache, simply restart your iPhone.

Thanks for reaching out to us!

iExpertPro