So ...

We are going to use a cool plugin called Easy Updates Manager.

Here it is:

https://wordpress.org/plugins/stops-core-theme-and-plugin-up...

This light yet powerful plugin will allow you to manage all kinds of updates. It comes with a huge number of settings for endless configuration ...

Here are the main free features:

• disable all updates with one click
• enable automatic updates with one click
• deeply customize your automatic update settings
• use logs to determine what and when something is updated
• hide plugin and theme updates (if custom developed)
• select which plugins and themes can be automatically updated
• disable core, plugin, theme, and translation updates
• Force Updates to check that automatic updates are working
• integrate with UpdraftPlus
• configure email notification settings
• and much more …

It's a relatively small plugin (540 KB), but let's see the usual speed tests ...

Here are my results before installing the plugin ...

... and the result after installing and activating the plugin:

As you can see, the plugin is almost invisible. No more comments needed ...

Now let's see how it works ...