You can often download specific versions of the MCT directly from Microsoft's servers. For 23H2, use the official 23H2 Media Creation Tool link to create an ISO or bootable USB. Visual Studio Subscriptions:
Win11_23H2_English_x64v2.iso
If direct links are unavailable, these community-vetted tools download files directly from Microsoft servers to ensure they are untampered: Microsoft Community Hub download microsoft windows 11 23h2 iso work