I was afraid of this, when I bought my 15PM. Traveled to Chile, and what would have been a quick transaction at the Entel store ended in disappointment. Apparently you need a Chilean ID to purchase an eSIM. Fortunately, I brought a pixel 3 I can hotspot, and takes a nano sim, but it’s something of a hassle. My only regret so far.
eSIM apps like Airalo and Holafly will sort you out. Went to Morocco a few months ago and was able to get unlimited data eSIM for about 20$ for the week I was there. And when I was done I just deleted it. I prefer that to having to buy a SIM card for a week’s stay. Airalo has an eSIM specifically for Chile