Step 1: Please go to the settings menu and Click the Branded portal settings button
step 2: Fill the required Details as shown in the picture
step 3: while Uploading the files please Check whether for Android it is 144 x 144 px with 1:1 aspect ratio and for IOS 192 x 192 px with 1:1 aspect ratio
step 4: Please select the portal settings and Type the URL
step 5: After filling please check the details you filled click save button
step 6: Click Visit your portal button in the corner