I’ve cleaned up from somebody that was… unwise… here, and that allowed the little people access to their iPad.
They had their settings corrupted.
Conversations deleted.
They had their device disabled.
They lost data.
And the coup de grâce; their iPad was damaged and needed repair.
Among other misadventures.
The busted iPad did (finally) convince them of the error of their (loaning) ways.
Do not allow little people near any gear you can’t afford to replace, nor near any data you can’t recover.
Data preservation:
… Archive or make copies of the information you store in iCloud - Apple Support
… Back up iPhone - Apple Support
Backing up will not protect your photos here, if you are using iCloud Photos. Only archiving.
PS: Some might be surprised about the damage possible to an iPad in a robust protective case, too. The little people saw it as a challenge.