Hello,
These email notifications come with WooCommerce plugin and our theme doesn’t influence this functionality. Probably, there is some problem in your server with sending emails.
Could you please test those emails by activating some other theme like “Twenty Nineteen” for a moment. So it will be clear that this is the theme issue or not because most of the time email server has not been set up and for that you need to contact your host support.
Also you can read and follow the below article that might help you:
https://wordpress.org/support/topic/woocommerce-emails-not-sending-5/
Best Regards.
.
