Assuming you would like tips on clearing the cache on your iPhone:
One of the simplest ways to clear your iPhone’s cache is to simply restart your device. This will cause your device to dump any cached data that it may be holding onto, which can help free up some space and improve performance.
If you’re looking for a more comprehensive solution, you can try using a dedicated caching app like iMyFone Umate Pro or PhoneClean. These apps are designed specifically for clearing out caches and other junk files from your iOS device, and they can often free up quite a bit of space.
To use either of these apps, simply download and install them on your computer, then connect your iPhone to the computer and follow the instructions provided by the app. In most cases, it should only take a few minutes to clear out all the cached data from your device.