I once had access to an OSK that would highlight the key images that corresponded to the keys as they were pressed on my physical keyboard. That was back in the days of Win 7. The program in question quit functioning early in Win 10 and I never put in the time needed to learn to touch type using that system. Is there a setting to do this with this OSK program?
Using the osk as a guide while actually typing in a physical keyboard
Assuming you’re using a Keyman keyboard, you can have Keyman for Windows display the OSK by clicking the Keyman icon in the tray and selecting the highlighted menu item below
Keyman keyboards that include the OSK .kvk file will display the keys for each layer.
For example, khmer_angkor
We don’t currently have a function to highlight keys as you type. We have an open feature request to implement this at OSK graphically responds to key pressed at real time · Issue #2481 · keymanapp/keyman · GitHub