Hi @Luan_Matos and welcome to the Make Community!
I’m not entirely clear on your process. Sharing the screenshot of your scenario might help.
That said,
You ask if you can use the same webhook to do the above. Yes, however, you will need something in the POST request to differentiate if it is an initial POST or a reply POST. A simple parameter (e.g., postType=initial, postType=“reply”) could be enough. Then you can use a router with a filter to decide which path to take: the one that sends the button to WhatsApp or the one that handles the WhatsApp response.
L