How the *^&* does one manage contacts in Microsoft Teams?

Today I switched on Teams in my Microsoft 365 account on my W11 desktop pc, but I cannot find any way to add contacts.
Everything seems to centre on the mobile version, so I installed that on my android mobile and set allow for everything that popped up, including "sync my device contacts".
I have yet to see any contacts in either the Windows app or the mobile app.
Why have a desktop app that relies on a mobile app which seems to do nothing?

Bring back Skype!!

Lots of chatter about problems with Outlook/Teams contact sync. Sorry, but all I can suggest is you go through some of the checklist to see if it works in your situation.

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New Outlook & Teams Instant Contact Syncing Inconsistencies | Microsoft Community Hub

Outlook contacts not synchronising with new teams | Microsoft Community Hub

Hornblower409 said:

Lots of chatter about problems with Outlook/Teams contact sync. Sorry, but all I can suggest is you go through some of the checklist to see if it works in your situation.

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New Outlook & Teams Instant Contact Syncing Inconsistencies | Microsoft Community Hub

Outlook contacts not synchronising with new teams | Microsoft Community Hub

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Unfortunately, as is typical with Microsoft, there is not much help in any of those communities.
As you said, lots of chatter but that's about all.
Patience is required.