Want to run Ragefire Chasm - scaling question

I play with my kids, wanted to take them into their first dungeon. They’re high 20’s, I’m high 30’s. Was expecting 10-15th level mobs in Ragefire Chasm, but they were all scaled up to my kids’ level. Is running easy low-level instances a thing of the past now? Does everything scale up to you?

When level scaling was implemented, all classic dungeons were scaled to the individual levels of appropriate level characters and scaled up to level 60 for those higher. If you put a higher level character in there to carry them, you are stuck with legacy loot. Now I think they scale up to 30. But you will need to be carried by a character much higher if you do not have a full group. I normally carry low levels through dungeons just for the quests.

Back when I started at the end of mop, my first character, a hunter, was able to solo RFC at level 27. At higher levels it was way easier. In contrast, in Classic there is apparently scaling that means it’s as hard to solo at 40 as at 25.