Use qemu to convert. Important note, "-O vhdx" has to be a capital O!
qemu-img convert bitnami-lamp-8.2.12-r0-debian-11-amd64.ova -O vhdx -o subformat=dynamic bitnami-lamp-8.2.12-r0-debian-11-amd64.vhdx https://www.bdrsuite.com/blog/how-to-import-ova-into-hyper-v/ |