The position of Taoiseach will rotate though (Israeli model), in 2022 Varadkar is set to become Prime Minister again.
Many people doubt Bibi would keep his word, I read on the Haaretz newspaper there will probably be another election in 2 years time before bibi agrees to rotate with Gantz.
what does the cabinet look like?
Harris and Varadkar are the only two I can see definitely staying on. They won’t want to replace a fairly competent Health Minister, and Varadkar will want to stay on in an important position. He might actually prefer Foreign Affairs if it’s his international profile he wants to keep up.