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.
Adding an eSIM via many services has been pretty easy for me. I used Orange in Europe and added it while in the US very easily, activated it once my phone connected to towers there. There appear to be quite a few options for South America as well.
In a lot of ways it was easier than physical sim and it was nice to have my local service and European service active simultaneously.