Hey, @NganNguyen20369,
I have seen your requirement for Hide Price extension for specific customer group.
We have developed one extension for this feature called "Magento 2 Hide Product Price Extension". It's perfectly match with your requirement.
Here's the Feature of this extension:
- Option to hide product price & add to cart button.
- Enable extension for specific customer groups if needed.
- Set your custom button title for add to cart button.
Hope this helps you.
Thank you.