Sending multimedia content and documents within chat conversations in Microsoft Teams
Hello Thomas,
You need to enable Optional Connected Experiences to allow Giphys in conversations.
If your admin has given you the ability to use optional connected experiences in Teams, you can go to Settings > Privacy in Teams and choose whether you want to use optional connected experiences.
Reference: https://learn.microsoft.com/en-us/MicrosoftTeam...
I hope this helps.
Kind regards,
Jayzar