Hello @Finn1sher, nice to make your acquaintance.
As @SuzieQ pointed out, we are unlikely to see an “official” /e/ Q for the Samsung S6 any time soon, if ever. With that being said, I would encourage you to try the unofficial build from @itsclarence, which is excellent. I am using it today. The only issue I’m having is the wifi loses connection from time to time and I have to disable/enable and it pops right back! I am not using the default phone/dialer app as the S6 (and other Samsung models) have an annoying echo issue where the other party you are speaking with hears themselves. However, I have not experienced this issue with messaging apps Telegram and Signal, which support voice communication. As it seems you are comfortable flashing ROMs, I would encourage you to try it.
Perhaps @itsclarence can be put in charge of that device for /e/ and get us “official” support one day (hint hint) 
Good luck to you and safe travels!
EDIT: It appears you already did! (I missed your comments in the “unofficial” thread before making this post.