How to pin a systray app's icon so it won't be hidden
Drag it.
OK. You want more. Click the up arrow. Drag the icon to the always-shown-icons area.
More? OK.
Click the Windows button.
Click Settings >
Personalization >
Scroll to the blue text "Select which icons appear on the taskbar" >
Toggle the toggle-button to "On" next to the icon you want shown.