From your homepage, click the "Create a Payment Request" button found in the top right.
Once you click that button you will be brought to the screen shown below.
After entering the information into the required fields click the "Complete Payment Request" button. Your request will appear as shown below where you can send via the Xometry platform or copy the link and send through your own custom email.
Your new Payment Request will now be shown on your Homepage and in Payments.