If you don't wish to use the Reserve with Google booking integration as outlined in this article, you can always just add your simpleERB widget to your Google Business profile that will sit in the 'Reservations' link section.
This will then direct the customer to your simpleERB widget to make a booking.
This could also be a suitable option for your restaurant if it is situated within a hotel and your hotel's Google my Business already has a 'Book a Room' Google reservation integration.
How to apply your simpleERB widget URL to your Google Business profile.
Sign in to your Google Business Profile,
Select Edit profile
Select the transaction type that you want to add a link to, such as Booking, Food ordering, or Pickup and delivery.
Select Add link.
If you already have links on your Business Profile, select Add another link.
Enter the URL that you want to link to the button.
Disable the Google integration here in your simpleERB account, please note it will take 24 hours to remove the blue Google Reserve button.
An example of the widget URL format is; https://www.simpleerb.com/XXX/yourrestaurantname/
If you can’t see the widget URL option in your Google profile, you may need to update your primary business category to ensure it's listed as a restaurant, click here for more information
Take note, it could take Google up to three days to approve the change and update the link to be visible.
The image below shows how it will appear on your Google Business profile.