I've come to the same conclusion. I was very surprised that certain MSQ trials in Stormblood, notably Susano and Lakshmi's normal modes, don't have a corresponding iLvl requirement.

The requirements don't have to be high, or even the recommended level for the dungeon or trial. But they ought to exist. There's a stricter iLvl requirement on retainer ventures than there is on multiplayer content!

- iLvl 60 for 50 content
- iLvl 90+ for 51, with small increases every 2 levels
- iLvl 135 for 60 content
- iLvl 180+ for 61 content
- iLvl 250 for 70 content

Considering certain level 50 contents drop iLvl 120 items, certain level 60 contents drop ilvl 225 items, and the 65- 69 dungeons drop iLvl 276-288 gear, these requirements are all perfectly reasonable.