There seem to be skill checks being automatically rolled while you explore. Those allow for spotting hidden objects, possibly traps as well.
https://youtu.be/B9hU6UJX_pc?t=1644
Time stamp: 27:25

There are of course manual rolls in conversations, but there also seems to be automatic ones. See this Intelect Devourer video, and you should be able to spot couple rolls being made (it's indicated in dialogue text, but the same icon as in the exploration example above appears in top left corner (timestamp 0:20):
https://youtu.be/rTxU5Yfpvqc?t=20

Last edited by Wormerine; 13/09/20 11:44 PM.