If VirtualBox is not booting from ISO or if GParted ISO is not mounting, correct the Boot Order in System Settings and verify ...
I don't think Virtualbox has a UEFI option, so I think virtualbox is (rightly) booting legacy. But still it can't boot from that ISO I just tried VMWare Player I notice that one can choose UEFI or not ...
VirtualBox 7.2.8 brings important bug fixes for Linux hosts, Wayland guests, and Secure Boot. 7.1.x also reaches its support end.
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