Protonmail is cop friendly. Any reasonable privacy aware email provider would hash the secondary email, not store it as cleartext. I implemented secondary email hashing for Riseup to prevent exactly this thing, over a decade ago.

https://restoreprivacy.com/protonmail-discloses-user-data-leading-to-arrest-in-spain/

Proton Mail Discloses User Data Leading to Arrest in Spain

Proton Mail came under scrutiny for its role in a legal request by the Spanish authorities leading to the identification and arrest of a user.

RestorePrivacy
@elijah damn, I use proton, for email & VPN. But, I don't use a secondary/recovery email address either for this reason. If I forget my account password, my data dies with it, as God intended.
@itsmeholland @elijah but they also logs IPs, at least for their email service, and they already gave those IPs to the cops in the past.
@just1602 @elijah yeah true, that's bullshit, kind of garbage to need a VPN to safely access your encrypted email service LMAO 🙄🤦