Most newer smartphones, including flagship models from Apple, Samsung, Google, and others, are eSIM compatible. Here are a couple of ways to check:
For iOS: Go to Settings > Mobile Service > Look for an option like "Add eSIM" or "Add Cellular Plan."
For Android: The path varies, but generally go to Settings > Network & Internet (or Connections) > SIM card manager. Look for an option to "Add mobile plan" or "Download a SIM."