Just heard back from Mazda today. Their response...
Thank you for contacting Mazda Customer Experience Center.
In regards to your inquiry about why the Find My Car on the MyMazda app is not functioning correctly. After further research the this feature will be removed when the new update is done on the MyMazda app. Mazda decided to remove the feature as it was not working properly. I do apologize for the inconvenience this has caused.
Thank you for contacting Mazda Customer Experience Center.
In regards to your inquiry about why the Find My Car on the MyMazda app is not functioning correctly. After further research the this feature will be removed when the new update is done on the MyMazda app. Mazda decided to remove the feature as it was not working properly. I do apologize for the inconvenience this has caused.