Update can’t see it found 14.7 current version ?

At some time in the past you installed a beta version of iOS 14 on your phone, which stopped being updated with 14.7. Go to Settings/General/Profile and delete the beta profile. You can then update to 14.8.

You have a beta version running on your phone.

Go to Settings > General > Profiles and delete the beta profile. 

Restart the phone and go to Settings > General > Software Update and click on the update.

Did you delete your beta profile first?