Support Jellyfin server side subtitle burned-in

My library contains some videos using ASS subtitles, which use some additional fonts. I can install and set up burning these fonts on the server for correct display on the client, but it seems impossible to add fonts on the iOS side.

Because other native clients of Jellyfin provide this option, can the subtitle burning option be supported in Jellyfin’s connection settings for iOS correctly?

Or is there another way to achieve correct font rendering?

By the way, it may seem difficult to import all dozens of additional fonts into the client.

If my language is strange, it’s because I’m using translation software.