This seems to still be an issue as of June 2020. My sister and I created a realm - she is the owner and made me an Operator. Originally before we had created it as a realm I had access to the World settings. After being made an Operator again once it was made into a realm, I no longer have access to these settings. I can do gamerule commands, but apparently changing Difficulty this way is considered a cheat...? So I cannot alter it this way.
Chris S.
This seems to still be an issue as of June 2020. My sister and I created a realm - she is the owner and made me an Operator. Originally before we had created it as a realm I had access to the World settings. After being made an Operator again once it was made into a realm, I no longer have access to these settings. I can do gamerule commands, but apparently changing Difficulty this way is considered a cheat...? So I cannot alter it this way.