The latest newsletter menu item is not something we will bring back, I am afraid
Instead of AcyChaptcha, which is now very insecure, you should use either Google hidden reCAPTCHA or hCaptcha for example. hCaptcha is something you have to install using 3rd party plugin, and then you will be able to use it in AcyMailing
Regarding the issue with the missing newsletters, this is something we can not solve here in the forum. Please raise a support ticket (https://www.acymailing.com/support/), so we can further assist you.