You will be navigated to All admin centers page. Select and click Dynamics 365.
It will load the Power Platform admin center window. In the Environments, select and click the environment for which you want to enable 2020 release wave 1 updates.
Environment will load up. You can view all the associated details, resources, version and updates available for the environment.
Under Updates, you must enable 2020 release wave1 as shown below.
If you need any further assistance, write an email to SalesTeam@mtccrm.com with subject as “2020 release wave1 feature assistance.”