No prompt to save correctly entered login details.

It does not do this so I am not sure what you saw.

https://www.reddit.com/r/1Password/comments/lwprkx/offering_to_save_passwords_after_login/

"this feature is something we've looked into several times and have no plans to give up on it, but currently offering to save a Login item after successfully signing in requires a few things we're not willing to do. To name one in particular, this would require arbitrarily capturing and maintaining data you've entered into fields as well as all the details of the page in the background, assuming you might want to save a login, as you navigate websites. Currently the most efficient and least invasive way to ensure your Login items are secured by 1Password with all of the correct data is by offering to save a new item from within the fields being saved themselves. I know it's not the most convenient method, but I assure you the conversation is still being had and the feature is still being researched with your security first on our list." ~5 months back.

Annoying but I learned to live with it. Once you have your passwords entered it is mostly a non issue since you will be generating passwords with 1password and that is front loaded rather than post login.

Personally that part of what brought me to 1password. They push security first and ease of use second.