Andrew Ozz

This plugin is intended for more advanced users that would like to change the default TinyMCE configuration in WordPress. 
It makes it very easy to add, remove or change all TinyMCE settings for the classic editor and for the classic block in the block editor.

Advanced TinyMCE Configuration

Set advanced TinyMCE options for the classic block and classic editor.

kubiq

This plugin will replace raw textarea by TinyMCE WYSIWYG editor when “Use HTML content type” is checked. 
Works for both Mail and Mail (2) in Contact Form 7.

Contact Form 7 – email body TinyMCE editor

TinyMCE WYSIWYG editor when "Use HTML content type" is checked in Contact Form 7 Mail and Mail (2)

Advanced TinyMCE Configuration vs Contact Form 7 – email body TinyMCE editor