Here is a list of WordPress plugins I tested and that I wish to keep track of : 

Spam protection 

• Advanced noCaptcha & invisible Captcha --
  basic testing on main site concluded : 2021.04.30.
• Invisible reCaptcha --
  basic testing on main site concluded 2021.04.30.
• Antispam Bee --
  basic testing on main site concluded 2021.04.30.

Mobile Friendliness 

• AMP and AMP Enhancer.
  fairly extensive testing on main site concluded : 2021.04.30.
• Accelerated Mobile Pages.
  basic testing on development site concluded : 2021.04.30.

Menu

• Max Mega Menu --
  exhaustive testing on test sites and on main site concluded : 2021.04.30.

Table of Contents

• LuckyWP Table of Contents -- 
  Fairly extensive testing on test sites and on main site concluded : 2021.04.30.
• Easy Table of Contents -- 
  Fairly extensive testing on test sites and on main site concluded : 2021.04.30.

Comment

• wpDiscuz. 
  Basic testing on development site concluded : 2021.04.30.
• Simple Comment Editing.
  Basic testing on development site concluded : 2021.04.30.

User Access, Role, Capabilities

• User Role Editor.
  Basic testing on main site concluded : 2021.04.30. 
• WPFront User Role Editor. 
  Basing testing on development site concluded : 2021.04.30. 
• Advanced Access Manager.
  Basic testing on development site concluded : 2021.04.30.
• User Access Manager.
  Basing testing on development site concluded : 2021.04.30.
• PublishPress Capabilities.
  Basic testing on development site concluded : 2021.04.30.