Well, the title says it. I have a Lenovo yoga 500, recently updated to 20.04. When I was on 19.10, the keyboard used to show automatically when I touch a textbox. However, now it won't open, unless I do it manually via the Universal Access menu. I'll be happy If someone can help me.
Logout and switch to Ubuntu(Xorg) session. That fixed both keyboard and rotation problems for me in Ubuntu 21
You need to turn it on under the accessibility options. Here's the official documentation. It appears to pop up all the time now though.
Open the Activities overview and start typing "Settings".
Click on Settings.
Click Universal Access in the sidebar to open the panel.
Switch on Screen Keyboard in the Typing section.