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, then click to edit the URLs section.
Under the Reservations URL option, paste in your simpleERB booking link URL highlighted in the setting here within the widget URL box and click 'apply' to update.
Disable the Google integration here in your simpleERB account.
An example of the widget URL format is; https://www.simpleerb.com/XXX/yourrestaurantname/
If you can’t see the Reservations 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.