the entire stereotype that gen Z is amazing at technology is overrated, it's the same as the millennials there's some people who have excellent troubleshooting skill and are able to use technology with very little issue, and then there's some that you can tell that they operate technology strictly on memorization not actually understanding how it works. You can differentiate the two by modifying their environments slightly and seeing if they struggle to figure how to do the stuff they normally do.

It's actually more likely that with how user friendly environments are, that gen Z is less Savvy when it comes to using technology then the Millennials due to the fact that they've been pampered into environments that don't require them to think outside the box, when I worked in the customer service field, it leans towards technical service and most of my customers who requested help were either Boomer or Gen Z, Millennials overall seemed to have the troubleshooting skills to be able to figure out problems without involving a third party.

That being said like above, this was a person to person basis I did have some Boomers who were able to rock the kiosks or have the troubleshooting the skills to be able to do it; just as I had gen Z that was able to rock the kiosk as well I'm just stating my observation of what usually happend.

Then to address the keyboard skills, most of what gen Z uses is going to be touchscreen, the desktop / laptop is a dying technology as a primary device for the younger kids as a whole, my sister didn't even have one until she entered College(outside of a school laptop) because she just used her mobile phone or tablet, neither of those required a keyboard outside of an on-screen which you can't use with the home system layout that used to be taught in school. So it's only natural that gen Z might have fallen behind in keyboard skills