I thought this used to be an option, but recently when I tried to group a payment from my partner (for a bill that we split) with a recurring item (the bill paid in full from my account), it would not allow me to group the items together.

Would be great if we could do this so it shows the accurate amount I personally paid on my Recurring list and on my calendar, rather than the full amount (which has been partially reimbursed in a separate transaction).