Is there a good way to extend how long the login cookie lasts?

I really hate using a password with pihole because it won't keep itself logged in in a browser session for more than ~30min. Pretty much every time I visit it, I've gotta login again. (unlike every single other service I host which remembers you've logged in for at least a week -> indefinitely)

I usually set no password, but Nebula-Sync doesn't support no password yet, so I'm stuck with having them at least for now.

A password isn't a terrible idea, I just don't want to have to enter it constantly.(regardless of using a password manager, that takes forever to popup sometimes)