Flocon de toile | Freelance Drupal: Prevent unsolicited mass submissions on its Drupal 9 (or Drupal 8) site

Several anti-spam solutions exist on Drupal to prevent the submission of forms (contact, newsletter subscription, etc.) by more or less well-intentioned robots. Without wanting to be exhaustive, we can use the Honeypot and Antibot modules which provide (different) non-intrusive defence mechanisms, or the captcha / recaptcha modules which ask the visitor to respond to different challenges before allowing him to submit the form.