The issue is India doesn't have a judicial agreement with Switzerland over data sharing (which includes User IP Addresses) for criminal investigations [0] while the US does [1], and Protonmail only honors Swiss litigation [2]
This should change with the new India-Switzerland FTA though.
This should change with the new India-Switzerland FTA though.
[0] - https://carnegieendowment.org/files/ParsheeraJha_DataAccess....
[1] - https://www.dataprivacyframework.gov/framework-article/1%E2%...
[2] - https://proton.me/legal/law-enforcement