Problem with missing yum package CentOS (Virtualmin)

I am struggling with installation of rh-php71 package using yum on CentOS 6.10 and wondering how I could debug what's the root cause. * I have followed instructions on scl :

-sh
    # 1. Install a package with repository for your system:
    # On CentOS, install package centos-release-scl available in CentOS repository:
    $ sudo yum install centos-release-scl
    
    # On RHEL, enable RHSCL repository for you system:
    $ sudo yum-config-manager --enable rhel-server-rhscl-7-rpms
    
    # 2. Install the collection:
    $ sudo yum install rh-php71

* However 2nd step gives me output:

No package rh-php71 available.
    Error: Nothing to do

* What I've tried is:

-sh
    yum clean all && yum makecache

But package is not found. * I have already rh-php70 installed from scl:

-shellsession
    $ yum info rh-php70.x86_64
    Loaded plugins: fastestmirror
    Loading mirror speeds from cached hostfile
     * base: centos.mirrors.ovh.net
     * centos-sclo-rh: centos.mirrors.ovh.net
     * centos-sclo-sclo: centos.mirror.ate.info
     * epel: mirror.freethought-internet.co.uk
     * extras: centos.mirrors.ovh.net
     * remi-php71: remi.mirror.ate.info
     * remi-safe: remi.mirror.ate.info
     * updates: mirrors.ircam.fr
    Installed Packages
    Name        : rh-php70
    [...]
    From repo   : centos-sclo-rh
    [...]