Can't see my number in the Whatsapp Business Cloud node

Questions
1

I added a new phone number in my WhatsApp Manager. If I open Meta Developers, I can see it listed among the numbers available as a sender.

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I’d like to use it to send messages with the WhatsApp Business API node in n8n, but it doesn’t appear in the dropdown menu. Why?

2

I solved this by turning the number selection dropdown to “Expression” and manually adding the Whatsapp number ID.

But still, this shouldn’t happen.