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Right now our kiosk mode assumes the customer is bringing their own keyboard, either physically or as part of their bespoke app.

Not all applications do that, though. Some customers expect the on-screen keyboard to be a standard feature of the kiosk platform, which is reasonable.

There are browser extensions, of course, that add the feature, but neither we or the customer have control over them, so customers may be reluctant to rely on them.

And of course, not all kiosk deployments are browser based anyway.

We don't currently ship any on-screen keyboards in RHEL 8, as far as I know, and most of the third party ones don't give a great user experience anyway, so I think the best option is to just provide a way in the kiosk session to switch out mutter for gnome-shell in a kiosk mode.

It has a pretty nice keyboard built-in and should solve the issue.

Of course for RHEL-9 we still need to a add an on-screen keyboard to gnome kiosk.

There is a functional OSK while running gnome-session-kiosk-session-3.28.1-15.el8.x86_64.rpm. To enable it simply select "Kiosk (with on-screen keyboard)" from the session selector cog at the login screen.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (gnome-session bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2023:2942