Can't access BIOS for MSI Z490-A PRO
If your board has a slot for a ps/2-type keyboard, use that, as you probably set the legacy USB options off and you have a USB keyboard, that now does not work until after the boot screen is gone. (yes, it boots a second faster, but you lose the keyboard.) I suggest resetting the BIOS with the jumper and start over.
(certified MSI tech)