@Phaedrux Sorry, I completely missed your question. I got it resolved - it is a Duet 3 v1.0 board. It was finicky, but I got it updated. I had to redo somethings on the SBC to get it to work.
I still can't upgrade the bootloader though to 2.2
So, i was so dumb that i loaded a wrong filament profile on prusa slicer. It was the same PLA but the wrong color. That particular color is 1.8mm in diameter instead of 1.75. Switched to the correct profile and everything went ok. 😰 😰 😰