Hi,
I have created a new test page as well as a new form builder addon in your booking page. Both are working now. I had to change the PHP mail to SMTP and then using your verified from email from global settings to your email template:
https://prnt.sc/Rqqm2tH8dMWY
https://prnt.sc/W6UAWDIBbw4o
Emails are now sent to the recipient email address. I have set my own email address there to check if it's working or not. Kindly change the recipient email in your email templates here: https://prnt.sc/KN9bWG2HDFTK and let me know if everything is okay now or not.
Note: you can remove the test menu and page from your site after checking.
Best Regards