Password completions on iPad with external keyboard

I use a Smart Keyboard on my iPad quite heavily. I have “suggestions” turned off with the external keyboard, as it’s generally not useful and wastes space.

In Safari, the password autocomplete option generally still pops up on first loading a web page or tapping into a relevant form, but it frequently disappears, and once dismissed, seems impossible to get back in this setup.

Is there a keyboard shortcut or other action for choosing to show the completion interface when using an external keyboard like this?