Teams contact card showing incorrect mobile number

Hello Eyad-,

To address your suggestions below:

Syncing Delays - This has been ongoing for a while now, so no changes in the last 24-48 hours. So I don't believe that it is related to a delay.

User Attributes in Azure AD - As mentioned in my post the information is correct in Microsoft Entra Admin Centre, which is the new name for Azure AD. So I don't believe that this is the issue.

Force a Directory Synchronization - As mentioned in my post, I am not using an On Premise AD server, so I am not sure where you are suggesting I synchronize to?

Teams PowerShell Module - I investigated this option, but from my understanding this was only for tenancies that have Call Plans enabled?

Clearing Teams cache - As this is for all users, not just individuals, I don't believe that this is the issue.

Teams Mobile App - This is both present on Mobile, Desktop and Web clients

Contact Card in Outlook - As I mentioned in my post the number is correct on the Outlook Global Address List. So I don't believe that it is the issue.

Check for Custom Policies - I was unable to see any custom policies in O365

Hopefully this responds to all your comments. Do you have any other suggestions?