I’ve just spend a very long time trying to install CE 9.2.0 to eMMC.
First of all, How to install CoreELEC to eMMC on LePotato needs to be edited. There is no need to edit the config file as lepotatotoemmc does it for you.
Second, after everything is done and written to the eMMC it will not boot.
The green and blue LED light up and that is it.
What I ended up doing was download CE 9.0.3, write to SD card and boot that without network.
Then disable automatic updating and plug in the network cable.
Go through the lepotatotoemmc steps and that worked as expected.
After that, update to CE 9.2.0. Done.
I’ve spend a couple of hours messing around while going from CE 9.0.3 to CE 9.2.0 can be done in 5 minutes.