Thank you for reaching out to us. I checked and it looks like your funds are currently under the Pending tab on your Overview page. This represents the standard security hold period in which funds cannot be withdrawn. Payments for fixed-price milestones (and bonuses) have a 5-day security period from the time payment is made to funds availability.
Feel free to check this help article to find more information about getting paid for Fixed Price contracts. Let us know if you have further questions.