How to downgrade google playservices on vivo v11 pro

[Android Central Question]

I want to downgrade google play services from latest version to 12.6.85. i have uninstalled latest version and trying to install 12.6.85 version but it is not installing and showing app not installed message. It is working fine on all other latest mobiles like one plus 6 and Oppo realme 2.

Can anyone please hep me regarding this.