This is not entirely true. Sounds like your TMC is booking through a third party ie a wholesaler and it doesnt have to be this way.TMCs can make the booking on your behalf directly in their GDS system, through the hotel and input your number and your loyalty will be recognised. I would speak to...

Actually sorry Im confusing this card with the Business Amex Plat Charge Card - which for some reason is missing any travel credit perk. Might be worth swapping over...

Not sure what the travel credit your talking about is on the Charge card, as everytime I ask about this they advise its only available for US card holders. ???