It was not a cameo it lasted 15 mins.
If Shatner was given enough money he would as it would be a chance to recreate his youth.
It's not expensive anymore as even YouTubers are doing it on their home computers as evidenced by recreating the Luke Hamill scene better than the official version.
I get that.
I dont remember Luke's scene in Bobba Fetts Mando episode being 15 minutes. Will have to rewatch it.
Anyhow i dont see the need. After 2009's films fans are now Ok with the Legacy Characters being recast for prequel series as long as they are a decent approximation of the look of the original actors...