Detlinde's chapter was enough to cover the major Ahrensbach drama so I don't think we need a Ferdinand or Sylvester perspective from the funeral now, though I wouldn't be surprised if we do just because it seems like there's enough going on there to fill multiple chapters.
Maybe a royal perspective going through Rozemyne's list of demands (like a royal headache report) could be interesting, highlighting some of the prep they're making on their end and it could comment on the funeral too.
Otherwise within Ehrenfest feels like we could do any of the first time prayer-goers, something with Damuel/Philine interactions, temple attendants learning that they're being left behind, Wilfried interacting with Barthold after being tipped off by Florencia - from any of his retainers perspective.