USCIS has your filing and mailed you a receipt notice (Form I-797C) with your receipt number. This confirms the case exists in their system -- it is not a decision.
What happens next
Keep the receipt notice: the receipt number on it is how you track the case from now on.
Official USCIS wording
On September 9, 2024, we received your Form I-765, Application for Employment Authorization, Receipt Number XXXXXXXXXXXXX, and sent you a receipt notice or acceptance notice. The notice describes how we will process your case. Please follow the instructions in the notice. If you move, go to www.uscis.gov/addresschange to give us your new mailing address.