Generator METAs are usually used to point to the authors of the services used inside a website. Lately, more and more WordPress plugin authors are adding their generator METAs in the source code.
The WordPress generator meta looks like this:
<meta name="generator" content="WordPress 6.*.*" />
To remove the Generator META from WordPress, use WP Ghost and activate the WP Ghost > Tweaks > Hide Options > Hide WordPress Version option.

The plugin will also remove:
- removes the version parameters from CSS Styles loaded in the source-code
- removes the version parameters fromJS Scripts loaded in the source-code
- removes the generator Meta to WordPress
- removes the generator Meta to WPML (WordPress Multilingual Plugin)
- removes the generator Meta to Slider Revolution Meta Generator
- removes the generator Meta to Visual Composer / WPBakery Page Builder
- hides the Jetpack analytics trails to WordPress