Hi Jena,
Please see the answer below:
If I cancel my membership, can I still use any unused licenses in my account?
No. You can use your available licenses as long as your membership is active, but you forfeit any unused licenses upon cancellation of your membership.
I would suggest you to download your remaining assets if you are looking to cancel the subscription as the ones licensed, would remain forever in your license history.
Also, you may refer to Common Questions about plans, purchasing, and availability, Adobe Stock
Feel free to update this thread in case of any additional query.
Regards,
Twarita