Super secure!!1one

Unsecure: open Shortcuts, tap Gallery, search “Adjust Clipboard”. Add to Action Button folder and run from Action Button. - Or add “Dismiss Siri and Continue” action after “Get Clipboard” so you can say “Siri, Adjust Clipboard”.

Type in the still-unreasonably small window, tap Done, paste password. (Then clear clipboard I suppose and consider privacy implication if your clipboard syncs to Mac.)