Thank you for your query.
You can define which map you would be using on SP Booking. Since recently Google Maps has become expensive, you might want to consider using OpenStreetMap which is free. However, you have the option to use both OpenStreetMap and Google Maps.
You can check out the following blog for adding Google Maps:
https://www.joomshaper.com/blog/the-easiest-way-to-add-google-maps-to-joomla-sites
For Openstreetmap, you can check out the following blog link below:
https://www.joomshaper.com/blog/tutorial-how-to-use-openstreetmap-on-joomla
Also, please do check out this section in the
documentation of SP Booking:
https://www.joomshaper.com/documentation/joomla-extensions/sp-booking/configuring-global-settings
Hope this helps you.