When will AMEX / American Express be supported by Garmin Pay

There was another thread on this that was locked without explanation.

If Garmin isn't able to support Amex cards on Garmin Pay an explanation would help their user-base. Many users are frustrated and the initial reaction is to think it is more about apathy rather than the more likely contract agreements, overhead or other financial costs associated with the network. 

Could we get some feedback from a representative on the situation that way the community can have closer?