it's not impossible, for sure, and the discussion group for companions has been closed, but just gotta say, unlocking the 2 new companions on 15 characters is worthy of a weekly endeavor or two. Mirri and Bastian, you ran through 2 small easy delves and they are unlocked. Isobel and Ember, still a little delve action but especially with Isobel, some running around just to make it take a while.
Sharps and Azandar, first time you have to plow through a public dungeon to unlock them initially. And Gorne in particular is a buggy mess, I have to reloadui repeatedly due to not being able to interact with containers or bodies, and I've been hit and killed by bosses on the far side of the map.
I really hope that in some future chapter when we see Companions #7 and #8, you don't have to do a dungeon or a trial. Maybe if you want them to be a challenge, ease back on the unlock but require harder content on the rapport quests along the way? I have to push through public dungeons 30 times to unlock these two for all my characters. Feels a bit much, especially compared to the first 4 companions.