When I'm playing Minecraft, I always turn my cursor down when I need to dig. Then my task bar becomes visible and when I press left click I'm pressing task bar. No matter when I'm playing with fullscreen or without it.

There is 2 short videos about this in my google disk.

https://drive.google.com/file/d/1BLGxeEbZS8OiTGfLMv2NAeSThGrwgfEA/view?usp=sharing

https://drive.google.com/file/d/1Q-86w2m6vY9bOz-Og3KgGZOxVoH87I8N/view?usp=sharing