Side conversation email Assignee

Due to our business use cases, we would like to have a feature whereby the assignee of the side conversation email can be different from ticket assignee.

BCC in side conversation email will not work in our use case 100% as we require the recipient to reply to the BCC as well.

Unfortunately, side conversation child ticket will not work in our case as side conversation emails are used to converse to the same recipient email addresses which their email provider/ticketing platform will diagnose it as spam.

Thank you!