Recovering wiped notes from low storage iPhone

"Recovering wiped notes from low storage iPhone: My notes app with so much of my important/ meaningful notes has been wiped. I have not deleted the app or done anything different. I can’t even see the recently deleted folder; the folders page is blank too."

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I. Troubleshooting Lost Notes:

Where to Go:

• Start Here: If you're Missing Notes on your iPhone, iPad, or iPod touch - Apple Support
• iCloud in Settings: Look in iCloud settings in each device, and make sure that Notes is clicked. If it is, then unclick it, and then click it again.

II. Troubleshooting iPhone Storage:

Internal storage cannot be upgraded. It is what it is. So, the maximum internal storage capacity never increases, even if you upgraded your iCloud plan. Learn More here: What's the Difference Between Device Storage and iCloud Storage? Apple Support

So, what to do...

Clear Space Using my User Tips:

• How to Clear Space from your Mobile Device, and What to Clear: - User Tip. You may have too much installed, and need to clear space. So, see my user tip: 
• How to Clear "Other" in your iPhone's Storage - Use Backup - User Tip. Caches would be being used for remembrance of application use. It is essentially the same for an iPhone. You'd backup your iPhone, and then restore your iPhone from the backup you've just created. All System Data will delete.

Do you see the missing notes at iCloud.com/notes ?