Print queue not visible on iPad

For iPadOS18, the Print Centre is now accessed from the Control Centre - although you will likely need to add the associated control from iPad settings. The Control Centre is exposed with a downward-swipe from the top-right corner of the screen:

Customisation of the Control Centre, including adding and arranging control icons, is fully described within the iPad User Guide:

Use and customize Control Center on iPad - Apple Support

warre224 wrote:

while printing, the print queue is not visible in the app switcher.

That’s true.