Unable to get into maskrom mode on E20C

I was trying to access maskrom mod in my Radxa E20C

Initially I was able to access the maskrom mode by pressing the maskrom button and powering on. I did flash the bootloader rk3528_spl_loader_v1.07.104.bin using the command

sudo rkdeveloptool db rkxxxx_spl_loader_v1.xxx.bin

The flashed the image istoreos-22.03.6-2024062810-e20c-squashfs.img.gz after extracting it with gunzip into E20C using the command:

sudo rkdeveloptool wl 0 istoreos-22.03.6-2024062810-e20c-squashfs.img

Then rebooted the device with the command:

sudo rkdeveloptool rd

It booted well but, now when I am trying to get into maskrom mode. I am unable to do it.

Any Idea whats going on here.

My host machine is running ArchLinux