Not getting much luck at the VirtualBox forums, so I guess this is a long shot but it would be good to at least get some confirmation. Does Intel integrated graphics just not work with Aero? After ...

VirtualBox has received a major update today which fixes crashes related to TPM, graphical issues on Windows 11, and performance problems on Macs. Aside from that, Linux 6.5 and 6.4 are supported.