Unpopular opinion: dead internet is not only real, but GOOD. Once robots get good enough to autonomously sign up for websites and make convincing posts, this will force us humans to go actually outside, make friends, form deep social relationship, and build lasting, resilient communities. Meanwhile on the internet, websites that are willing to allow AI content for money will eventually die out due to lack of actual users. The only remaining websites will be run by individuals and organizations with non-profit motives, and a strict human-only policy with verification based on word-of-mouth / invite system.

You can lock your password database with a key file (this is a standard feature in keepassxc) and transfer the key file once between devices via sneakernet (microsd or usb drive). That way even if someone intercepts your database file, AND knows your password, it is still virtually impossible to crack. Should be a good enough solution, unless you are quantum-tier paranoid