From what I have been able to find, it should be possible. I believe QMK configurator will or can be made to be able to update the configuration for the pocket.
@Savasten have you already received your pocket reform (i’m still waiting for mine) if yes have you tried to install qmk?
it’s unclear to me if attempting to do so might break things (ie some keys might not work during boot phase for example)
for more context I have a fully prebuilt dygma defy with layers, but have never actually installed qmk (i’m a software engineer but haven’t really tinkered with very low-level/OS stuff for ages)