Public submission & editing

Like a previous post, I would like guests to be able to leave reviews (without creating an account or logging in).
https://www.joomunited.com/support/pre-sales-forum/my-testimonials-presale-questions-and-features-requests/public-access

With previous software I had problems with spam reviews until CAPTCHA was enabled. I cannot see this in your screenshot or videos of the front-end submission form.
But in one post you said it is available
https://www.joomunited.com/support/pre-sales-forum/my-testimonials-presale-questions-and-features-requests/captcha-in-my-testimonials
Is the setting to enable CAPTCHA part of your module, or part of the core Joomla?

Also, in your video it seems that some users can edit and delete reviews on the front-end.
Can you please explain how that would apply in the case of guests on the website?
It would be a disaster if guests could delete or edit others' reviews.
But it is OK if a guest can edit/delete just their own review (within the same browser session, maybe detected with a cookie).

Please advise.