It looks like this is required by the HTTP spec: https://httpwg.org/specs/rfc9110.html#field.from
A user agent SHOULD NOT send a From header field without explicit configuration by the user, since that might conflict with the user's privacy interests or their site's security policy.
alt Hacker News
A user agent SHOULD NOT send a From header field without explicit configuration by the user, since that might conflict with the user's privacy interests or their site's security policy.