Sorry - my mistake. This use to be possible in previous versions, I believe, but not in this one - so I don’t think I was recalling correctly. Adding styling to references complicates things around export and parsing, so it is not likely to be available to allow formatting like what you’re looking for, please see this thread here for a more detailed explanation: Add styling to parsed citations - italic - #2 by navotera
Best regards,
Roger
PKP Team