If you have heard about Microsoft Fabric in the Microsoft Build 2023 event’s announcement, Here are explanations for enabling it for your tenant. This setting will be automatically enabled for you in the future; this is just in the meantime if you want to get your hands on Microsoft Fabric from the early days.
Power BI Admin Portal
An easy way to enable this is to go to the Power BI Admin portal in the Power BI Service.
This, of course, needs to be done by the Power BI tenant administrator or Office 365 tenant administrator.
Once you are in the admin portal, under Tenant Settings, the first option would be for Microsoft Fabric (Preview). Enable it. You can enable it for the entire organization or for a specific security group.
Once you apply the change, it will take up to 15 minutes, and then you should see some effects of Microsoft Fabric in your tenant. The first would be seeing the Power BI icon on the left bottom side, which if you click on it, you can see other workloads of Microsoft Fabric and can navigate to those.
Here is the Microsoft Fabric main page in the portal;
What is Microsoft Fabric?
If you are new to Microsoft Fabric and would like to know more about it, I explained it in an article here;