Hello JerryCo007
welcome to the Microsoft community, My name is Yakubu Suleman I'll be happy to help you today;
I understand that you want to know when Microsoft is going to update the Teams for IOS client to support external cameras
Microsoft is still working on this update but currently there is no ETA as to when this will be implemented.
For product feedback, kindly use this link to drop your feedback about this product:
https://feedbackportal.microsoft.com/feedback/forum/ad198462-1c1c-ec11-b6e7-0022481f8472Also, providing you with the Microsoft Office 365 Roadmap Link so that you keep yourselves equipped with the newer features and functionalities -
https://www.microsoft.com/en-us/microsoft-365/roadmap?filters=Please click Mark as Best Response & Like if my post helped you to solve your issue.
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Kindest regards,