I have developed a Desktop App for Linux with Flutter.
My Flutter Version is: Channel dev, 2.6.0-0.0.pre, on Ubuntu 21.04 5.11.0-1015-raspi with VS Code Version 1.56.2.
Flutter doctor did not find an issue.
Since i want to use this app via touchscreen and i have to input some text, i need the onscreen keyboard to appear. I have activated it in the accessibility settings. When i'm clicking on a text field, the onscreen keyboard isn't displayed. Trying it with e.g. Firefox its working fine.