https://screenrant.com/frasier-reboot-character-returns-cheers-want/

There are characters from Frasier Crane's past in Boston's Cheers and Seattle-based spin-off that should make an appearance in the reboot.

9 Frasier Cameos We Hope Happen In The Reboot (That Aren't Niles & Daphne) (https://screenrant.com/frasier-reboot-cameos-not-niles-daphne/)

Aside from Niles and Daphne, there are numerous fantastic Frasier characters that would be absolutely perfect for a cameo appearance in the reboot.