Hi renate, thanks for answering.
It's a shame we are losing fastboot with newer versions.
So it seems EDL is the way to go, cpuinfo says that is a snapdragon 665. I've never used edl with qualcomm.
I can see two edl clients, one is
https://github.com/bkerler/edl and the other is
https://www.temblast.com/edl.htm
I see in other comments that people use the second link that is a windows app.
I use linux, and it's difficult for me to find a windows machine, do you know if first link is current enough to support the boox edl?