So you are missing your ‘Landing Page’ report in GA4.
Don’t worry! GA4 has the information, but may not present it to you in the way you are used to seeing it. So, if you want to see landing pages, just go to Engagement > Pages and Screens.
Select ‘Page Paths and Screen Class’ them select Event Count, ‘Session_start’ and sort descending. And ‘Voila!’ the landing page report!