Yes, it is very simple. You can change the business name in the Online booking tab — Setup — Business profile. Here, under the title Details, you will see the current Business name, which you can change.
Where to find this setting in the Reservio Business app
You can also change the name of your business in the mobile app. Click on the Menu icon in the bottom bar and select Business profile. Click on the pencil icon next to your current business name, and change it. In the end, don't forget to Save the changes