It happens. Your supervisor has a lot on their plate.
Here's the thing. If it's been more than a month, we've already notified your supervisor and sent them a reminder. This is an online tool to make your lives easier, but even we'll admit there's nothing quite as reliable as face-to-face when things go astray.
Go ask your supervisor to login and approve your hours next time you see them. Mention how you're paying attention to your progress and want your charts updated on WorkHands. They'll be glad you did.
Oh - your supervisor left the company? Is on leave? In that case, if you have another assigned supervisor, they can log in to approve your hours. If not, contact your administrator to take care of it.