Yeah, that Rockmaw in the mine was pretty "easy". I also had to return to it later on because I was quite low level when I first came to that area but later on it was very doable.
The Frozen Wilds fight I meant can be seen in this video (spoiler alert for anyone who has not done this Frozen Wilds quest). The monster is called differently but its design is obviously heavily "inspired" by the Rockmaw.
I was also glad when I was finally done with the Frozen Wilds (and the game since I finished it before FW). A little longer and the game would have overstayed its welcome. I liked it all well enough but it was just about to get a bit tedious on the home stretch.
That's why I'm in no real hurry regarding Forbidden West (if it ever comes to PC at all). The saturation effect from this game and setting is a strong one for me personally. I'll be ready and curious about how Aloy's adventures continue in due time if and when a PC port is coming.
Ok, I remember that fight now. Some guy not far from there gives you the quest to kill it, right? I was wrong about the name btw. It's called a Rockbreaker not Rockmaw, but the quest giver had his own name for that particular one.
I played HZD as soon as it hit Steam in summer 2020, so I'm ready for HFW. I just hope we're not waiting years for the PC port again.