Question:
https://dinonline.org/2014/02/27/should-you-fast-daven-on-yom-kippur-katan/
Regarding your statement here that Yom Kippur Katan is not observed on erev Rosh Hashanah – this is unclear, since in fact it is accustomed to fast on erev Rosh Hashanah and to recite many selichos/ prayers.
Answer:
You are right, on Erev Rosh Hashana it is the custom to fast, however the selichos that we say are before shacharis, and not in middle of mincha like the usual Yom Kippur Katan
