Yahwa Sinwar's brother Mohamed Sinwar, who became the top leader of Hamas after his brother's death, has now been reportedly (unconfirmed) killed in an Israeli airstrike
Mohamed Sinwar and the bodies of 10 aides were found in a tunnel in Khan Yunis... underneath the European Hospital, after that airstrike that the western media decried as a war crime
https://www.pbs.org/newshour/world/israeli-strikes-kill-at-least-54-in-southern-gaza-hospital-sayswe've got fun anti-israeli articles like this;
https://www.genocidewatch.com/single-post/israel-falsely-claimed-gaza-hospital-had-tunnel-after-striking-it-israel-media-saysQuote
Israel falsely claimed Gaza hospital had tunnel after striking it
As it turns out, the EU hospital indeed had a tunnel, and the top Hamas leader in it;
https://www.jpost.com/breaking-news/article-854374Quote
Defense Minister Israel Katz on Sunday told the Knesset Foreign Affairs and Defense Committee that there are rising indications that Gaza Chief Mohammed Sinwar is dead.
Katz made his statement just as IDF sources on Sunday told The Jerusalem Post that it did not recognize foreign reports that Gaza Chief Mohammed Sinwar's body has been found with around a dozen of his aides, including Rafah Brigade commander Mohammed Shabanah.
It appears that the IDF will wait either for Hamas to officially announce him as dead or its own intelligence regarding his body.