Step by Step Procedure to Enable 2020 release wave 1 in D365 PowerApps
Step 1. Login to https://make.powerapps.com/
Note: You can also navigate to the PowerApps portal through D365 Solution > Open any solution and on the top, you can see a popup bar displays, click on the New Experience link it will navigate to the PowerApps portal.
Step 2. Now Go to Settings > Click Admin Center or You can directly go to Admin Center https://admin.powerplatform.microsoft.com/environments
Step 3: Select your CRM instance from the Environments section as shown below:
Step 4: Follow the below steps 1-3 as shown:
All Done! It will take some time to get all changes updated. Thanks!