Firstly, thank you Garmin for all the new features and bug fixes in 3.00.
Unfortunately Physio-True Up still only works if you have a VO2Max on your Edge.
Scenario - Went for a ride using Edge 520+, it records a Recovery Time. Recovery time does NOT sync to 935.
BUT if you have a power meter or a VO2Max value on the Edge then it WILL sync.
I did raise this with the beta team as part of 2.84 but doesn't look like the fix made it into 3.00
So far that is the only issue I have found with 3.00