This is a weird title and IMO should have included "international resellers" to emphasise the risks are sourced from there, not really due to the eSIMs themselves. Those online-only, travel-oriented resellers, are incorporated or using providers from unregulated or less regulated markets.

If you use an eSIM provided by your own domestic carrier, which I do and many of my friends, especially when having more than one phone number, almost none of the risks in the paper are applicable.