People who are makpid to not eat gebrokts will often not eat off the same kelim. If that’s their choice, maybe let them bring their own food. I don’t see why people who keep perfectly KFP homes and who brok should have to do backflips to accommodate “machmirim.”
There’s the minhag not to mish. Let the machmirim not mish and feed themselves.
In my family, sadly, this became a big issue. I have a female relative who married a Lubavitcher and they don’t eat ever by us for Pesach or Shavuos because they won’t eat off cholov stam kelim or kelim that came into contact with gebroks.