Hunger scale vs intermittent fasting

Hi, I am sure this has been asked before- I am reading your book “If I’m So Smart…” and I’ve watched the video on overeating- is intermittent fasting consistent with following a hunger scale.
Are we not supposed to be hungry when intermittent fasting?
I am trying the 2x/day eating and not sure what sensation I am feeling .. feels weird lol
Thank you (again and again)