Pretty much every broker does that when you buy stocks too. I think most securities settle T+2, which means that you are not the owner (and cash hasn't gone out

Pretty much every broker does that when you buy stocks too. I think most securities settle T+2, which means that you are not the owner (and cash hasn't gone out of the door) until 2 business days after the transaction. But the broker will show your account debited immediately and will add the stock to your portfolio in the UI too. It's well intended but misleading.