w10 + w11 displays the green [H] tray icon only for a short time in the tray.
To make it permanent visible:
¹click the tray menu ▲
²dragNdrop the Icon back to the tray
ALL Click on the arrow in the notification area on the taskbar, and click on "Customize"
Underneath the box with all icons there is a checkbox
Only the H icon: Click/tap on the Behaviors drop down arrow menu to the right of the icon select show icon and notification