The GrapheneOS Contacts app still uses the legacy vCard version 2.1 when exporting contacts, even though many apps and services (for instance, Proton Mail) no longer support this version. It may be better to use vCard version 4.0: https://devguide.calconnect.org/vcard/vcard-4/
The GrapheneOS Contacts app still uses the legacy vCard version 2.1 when exporting contacts, even though many apps and services (for instance, Proton Mail) no longer support this version. It may be better to use vCard version 4.0: https://devguide.calconnect.org/vcard/vcard-4/