Electronic certificates on iOS mobile devices
Skip information indexiOS. How to delete your electronic certificate
It is possible to remove certificates installed on an iOS device by accessing the system settings.
To verify that the certificate is installed, from iOS 15 and later go to "Settings", "General", "VPN & Device Management".

Choose the certificate you want to delete and enter the Device unlock code. A new screen will appear notifying you that modifications will be made to your device.

To reinstall the certificate, see the help "How to import a valid copy of your electronic certificate on iOS devices".