I was waiting to hear from you! Too bad I couldn’t solve your issue. I’m assuming that you already have removed the crank and put grease on it! if not I would do left and right as well as pedals.
I heard from others that some times is the plastic covers that creaks but i’ve never had this...
I have a Kenevo and I had similar issue a couple of weeks ago. I’m extremely picky with noises so the day it happened it was driving me insane. First though was cranks, then pedals, next ring. Checked everything but no luck. My last thing was to check the small chain guide. I didn’t notice any...