Iphone Contacts

This is just an example...

Try to export the contacts from google mail on a web browser. During Export select export as vCard and then

log in to https://www.icloud.com using your Apple ID credentials Tap Contacts app > Settings > Import vCard.

Unlike some Android devices, contacts are neither stored locally on an iPhone nor in SIM. They are synced to an email account that you had Google, iCloud, AOL, Exchange, Outlook, Yahoo or any Other

If Contacts were on iCloud, try this --> Restore contacts, calendars, bookmarks, and more using ...

Else Add the email account that stores your contacts in the IOS mail app and enable Contacts.If you have a corporate email account added through a profile on your device, please check with your organisation's system administrator.