Note (ColorOS 17)

1- You may face some lag after flashing the ROM it's normal since that ColorOS version is early BETA so after flashing the ROM let it settles for some hours or One day at least

2- to install Google Play Store search for Google play inside Oppo market and make sure that you Enabled Google service in Settings

3- If you're facing some 5G issue in Jio network to fix that flash from Indian HyperOS 3.0.30* firmware the modem.img file