How to Save Passwords after the first time has passed?

The first time you enter details it offers to save them, assume you decline.

If at a later date you decide that you would like to save them is there a shortcut?

I think on other browsers it is Hold Shift while logging in?

How is this achieved on Brave?

On the right side of the address bar, there will be a key icon. If you click on that, it should ask if you want to save the password for that site.