Autofill not working in Firefox for kfc.com.au

The autofill thing on top of the Samsung Keyboard doesn't show up when using Firefox on Android (Samsung S22 Ultra) to login to kfc.com.au.

I tried it on Chrome and it pop up on top part of Samsung Keyboard sometimes; usually when I then open 1Password app and fingerprint unlock and switch back to chrome, it'll appear; doesn't happen for Firefox, just doesn't work.