Hi Jen,
Thank you for posting, I am here to help you today. Regarding your post regarding Phone Link the answer is No, the Microsoft Phone Link app does not have a feature to track the duration of calls.
It only shows a history of recent calls. To find the length of a call, you must check the call log on your physical phone itself.
Please let us know if you have any further questions or if there’s anything else I can assist you with. I'm happy to help!
Best regards,
Jansher