https://screenrant.com/frasier-reboot-niles-martin-replace-freddie-david/

Unfortunately, the Frasier reboot won't be able to feature Niles and Martin Crane, but the upcoming Paramount+ series is able to replace them.

Frasier Episode 7 Turns The Reboot's Niles Replacement Problem Into Its Best Joke (https://screenrant.com/frasier-reboot-alan-not-remembered-best-joke/)

Niles' replacement becomes the butt of the funniest joke in the Frasier reboot episode 7, effectively hiding the problem with the character.

The Frasier Reboot's Niles Replacement Exposes Why The Frasier & Freddy Story Isn't Working (https://screenrant.com/frasier-reboot-freddy-father-son-story-problem-alan/)

Niles' Frasier reboot replacement, Alan, perfectly lays out the reason why Frasier and Freddy's story isn't as compelling as it should be.