Looking at the ecoflow app today i spotted a new undocumented setting after the purge function, which looks like it MIGHT stop the compressor shutting down after every dhw run. I have set it to 1 min, and will see if there is any effect.
Edit: Nope, no effect even if set to 10 mins the compressor still stops after dhw every time. I guess the implementation at the heatpump end is not there yet, even though you could set the option, much like water pump speed was.