Ok so tonight I managed sync mfp on iOS to garmin connect
Two things I did
Made sure iPhone clock set to 24 hours
Open garmin connect on phone
Goto setting privacy and disconnect my fitness pal
Then go back to the home page and on caloris monitor
Click on the get started
Slide to left until it says click to get started
The click on linking accounts
Hope it works for you
My back log isn't showing but today's exercise is