That variable wasn’t defined. I updated that yum.conf and I have got this result:
Loaded plugins: fastestmirror, langpacks, universal-hooks
Loading mirror speeds from cached hostfile

  • EA4: 206.130.99.76
  • cpanel-addons-production-feed: 206.130.99.76
  • cpanel-plugins: 206.130.99.76
  • remi-php74: mirror.sjc02.svwh.net
  • remi-safe: mirror.sjc02.svwh.net
    EA4 | 2.9 kB 00:00:00
    cpanel-addons-production-feed | 2.9 kB 00:00:00
    cpanel-plugins | 2.9 kB 00:00:00
    base | 3.6 kB 00:00:00
    docker-ce-stable | 3.5 kB 00:00:00
    epel | 4.7 kB 00:00:00
    extras | 2.9 kB 00:00:00
    imunify360 | 2.7 kB 00:00:00
    imunify360-rollout-1 | 3.0 kB 00:00:00
    imunify360-rollout-2 | 3.0 kB 00:00:00
    imunify360-rollout-3 | 3.0 kB 00:00:00
    imunify360-rollout-4 | 3.0 kB 00:00:00
    mongodb-org-4.4 | 2.5 kB 00:00:00
    mysql-connectors-community | 2.6 kB 00:00:00
    mysql-tools-community | 2.6 kB 00:00:00
    mysql57-community | 2.6 kB 00:00:00
    remi-php74 | 3.0 kB 00:00:00
    remi-safe | 3.0 kB 00:00:00
    ul | 2.9 kB 00:00:00
    ul_ipage | 2.9 kB 00:00:00
    updates | 2.9 kB 00:00:00
    No package mongodb-org available.
    Error: Nothing to do