DietPi v9.13.2 on PC Engines APU2: No heartbeat LED option in config

I’m new to Dietpi and have recently installed v9.13.2 on a PC Engines APU. This board has 3 LED and I’d like to have led 1 as a heartbeat. I see no option for that under LED Control.

I have options for cpu, cpu1, cpu2, cpu3 and other options related to disk, kbd, etc.

How can I enable this?

If I’m not mistaken, all available options are listed based on availability by firmware aso. Probably the device is not supporting heartbeat as option.??

I used to run Voyage MPD Linux (music server oriented distro) and had a heartbeat enabled by default.

Can this be enabled manually? Put a request in?