I still have message that I cannot update my iphone 7s, even tho I cleared enough out of storage.

See “If there’s not enough space to update” here.

If your iPhone, iPad, or iPod touch won't update - Apple Support

By the way, Apple never released a model iPhone named iPhone 7S. There is no such device.

To update over the air from the phone all of these requirements must be met:

• You need at least 6 GB of free storage
• You must be connected to a Wi-Fi network (and not a personal hotspot
• The phone must be charged to at least 50%, and preferably plugged in so it stays above 50% during the update
• The phone must not be in Low Power Mode
• The phone must not be connected through VPN
• The phone cannot be in Airplane mode
• You cannot still have a beta version installed on the phone

If you can't meet all of them you can still update using your computer.

You can update using a PC with iTunes→Update your iPhone, iPad, or iPod touch - Apple Support

However, if you meet all of the requirements I posted you should be able to update from your device.