Just for context, genocide is:
any of the following acts committed with intent to destroy, in whole or in part, a national, ethnic, racial or religious group, as such:
(a) Killing members of the group;
(b) Causing serious bodily or mental harm to members of the group;
(c) Deliberately inflicting on the group conditions of life calculated to bring about its physical destruction in whole or in part;
(d) Imposing measures intended to prevent births within the group;
(e) Forcibly transferring children of the group to another group.
— Convention on the Prevention and Punishment of the Crime of Genocide, Article 2[7]
I'm not a lawyer, but I think the "total siege" of Gaza (as defined by the Israeli government) is relevant to clause (c)
And the indiscriminate bombing is relevant to clause (a).
Not related to genocide, but relevant to ethnic cleansing are Smotrich's comments
"What needs to be done in the Gaza Strip is to encourage emigration," Smotrich told Army Radio. "If there are 100,000 or 200,000 Arabs in Gaza and not 2 million Arabs, the entire discussion on the day after will be totally different."
He said if the 2.3 million population were no longer there "growing up on the aspiration to destroy the state of Israel", Gaza would be seen differently in Israel.
"Most of Israeli society will say 'why not, it's a nice place, let's make the desert bloom, it doesn't come at anyone's expense
https://www.reuters.com/world/middle-east/israeli-minister-repeats-call-palestinians-leave-gaza-2023-12-31/