I saw a post on a Facebook travel group that Turkey has blocked some eSIM providers Those affected are:
- Airalo
- Alosim
- BNESIM
- Holafly
- Instabridge
- Mobimatter
- Nomad
- Saily
From what I read, people will still be able to buy eSIMs from the above providers but must activate them before arriving. Furthermore, it seems like Turkey is restricting access to the websites and apps of these providers. I just checked Airalo and Saily, and both are still selling Turkish eSIMs.