This is a big one, and its absence deeply undermines the "Universal Print" branding.
Ideally, any InTune-managed device should be able to leverage Universal Print on an OS level, to include Android and iOS/iPadOS. For Android, this would be one rare feature that you'd likely want to blur the lines between the personal and work sides of a device, too, allowing for a user to print just as freely from a PDF shared over WhatsApp by an external contact as they could a Word doc on the protected work side.
But acknowledging the complexity of all that, it's critically important that the iOS and Android app devs add print capabilities to all major mobile Office apps, most critically Outlook, Word, Excel, PowerPoint, and OneDrive.
Expecting users to be able to remember to and master any MFA complexities of giving up on those apps that lack this feature and instead reverting to the mobile web UX or some weird Edge workaround isn't realistic.
Live up to the name, and ensure that all product teams working on Office for mobile devices universally enable access to Universal Print.