As part of changing laws in Europe, Meta now offers the option for you to chat with others using third-party messaging apps that have integrated with WhatsApp and that you choose to turn on.
Note: Chats with third-party apps are only available in select regions and may not be available to you.
I feel sorry for all in the wrong region.
is there a list of 3rd party apps? being in the ‘wrong region’ and the linked page just says: “Chats with third-party apps are only available in select regions and may not be available to you.” Changing my VPN to an EU country gives me the DMA version which still doesn’t state which apps they have actually integrated with.