The T-Pose emote is an Uncommon Fortnite emote. T-Pose was available via the Item Shop for 200 V-Bucks and you can buy it from Fortnite Item Shop when it will listed.
Fortnite T-Pose Emote Details
Chin up, arms straight!
Fortnite T-Pose Emote PNG Images
Here is the PNG images of T-Pose below!