WP Config WordPress Auto Update Timing

I have about 3 dozen WordPress websites, I am trying to make it quick to update all of the websites.

In the WP Config file I have define('DISALLOW_FILE_MODS',true); added because I can not have users adding plugins to the website, but of course this disable all auto updates.

I am trying to quickly update all websites by temporarily commenting out the //define('DISALLOW_FILE_MODS',true); and adding define( 'WP_AUTO_UPDATE_CORE', true ); to the WP Config file… though when I do this WordPress doesn’t automatically update. Maybe WordPress waits 24hr or something to do the update, I am not sure.

Is there a way to have WordPress automatically update (or within a couple seconds/minutes) when I comment out //define('DISALLOW_FILE_MODS',true); and add define( 'WP_AUTO_UPDATE_CORE', true );?

Any help would be appreciated! Thank you in advance!