I have had my first order and still haven’t received my payment after two months. I use shopify payments and am confused if there is any reason for this.
It’s hard to guess without any information on what you’ve looked into, or details of the order, but you’ll probably find the answer if you read the documentation: https://help.shopify.com/en/manual/payments/shopify-payments/faq and then look in the payouts section of your store and the order in question.
My guess is the order was refunded, or you received the payment and didn’t notice, but only you or someone with access to your store would be able to check that information.