However, by far not all Z590 mainboards have the microcode update revision 40 yet.
Every Z590 mainboard where the latest BIOS is from April 2021 is still on microcode 3C, mine included (Z590 GAMING FORCE). So i assume that first, those mainboards will also get the newer BIOS from June 2021. And only then, maybe the Z490 boards will get it, since they are lower priority being the older products.
Z590 already on microcode 40:
Z590 still on microcode 3C:
MAG Z590 TORPEDO
MAG Z590 TOMAHAWK WIFI
MPG Z590 GAMING FORCE
MPG Z590 GAMING CARBON WIFI
MEG Z590 ACE
MEG Z590 GODLIKE
No one here will have any idea when any specific bios will be ready for any board. This info is not shared with even the moderators.
Best we can say is to wait, or contact MSI directly about it. See : >>How to contact MSI.<<