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.
You might have a better chance with a small street vendor. I noticed this is the case for some countries where the small street vendor sometimes doesn’t care to check your ID even when they are required to. Not sure if this is the case in Chile.