Please wait until configmgr 2409 is released which actually supports deploying Windows 11 24h2.Recently i have deployed windows 11 24H2 Deployment via SCCM however start and search menu not working. for testing purpose i created simple deployment package.
I have got same issue, deployed all available OS version 22H2, 23H2, 24H2. SCCM version is 2309.Please wait until configmgr 2409 is released which actually supports deploying Windows 11 24h2.
The start menu and search may not work sometimes and even I have encountered this issue. Open the task manager and restart the explorer.exe and let me know if that works.