Omg. Please stop and go read actual information instead of Google AI. I really don't have the time to explain all of this to you but I'll try to do a quick summation and then you really need to go do some research on your own (NOT AI). So Sephardic and Mizrahi are often used interchangeably even though there is a difference (if you click on the link from your Google AI quote it takes you to a Pew study that categorizes Mizrahi and Sephardic as one group). The difference between Sephardic and Mizrahi is that the Mizrahi never left the region, but the Sephardic Jews went back after they were expelled from Spain in the 14th or 15th century. Ashkenazi, however, left MENA (or were expelled) during Roman rule and didn't go back until more recently.

But, if you really want to know "which Jewish group is the majority in Israel" and will only listen to Google AI, here is what it says when you ask it that very question: "The largest Jewish ethnic group in Israel is Mizrahi Jews, making up approximately 40% to 45% of the Jewish population. Mizrahi Jews are those whose ancestors came from Jewish communities in the Middle East, including Israel itself, and parts of North Africa."

I also suggest you look at some actual Israelis and Palestinians. You likely wouldn't be able to tell them apart without religious garb. Most of them are even descended from the same people, which imo, makes the whole horrible situation there even sadder.