Some keys on Logitech slim combo keyboard for ipad pro not working
The apostrophe, &, \ backslash and < keys did not work after I updated to OS 13.4. I called Apple support (I told Apple support this started after I upgraded to 13.4) and they had no fix for my problem. They suggested I buy a new keyboard since mine is out of warranty or call Logitech to see if they would replace the keyboard. Luckily, I went on Logitech's community and found the fix. Go to your iPad settings—general. Click on “Keyboard” and change the setting from “Automatic” to “English” or in my case English—ABC extended. Now the keys work. It will save you from buying a new keyboard and a lot of time with Apple support.
iPad Pro 10.5-inch, Wi-Fi