Passing an unlocked LUKS partition context from GRUB to Linux?

### Question In GRUB one can use the [cryptomount](https://www.gnu.org/software/grub/manual/grub/grub.html#cryptomount) command to mount a LUKS partition. Is there a way to pass this decrypted partition to linux such that it appears as a device mapper (/dev/mapper/xxx) entry without having to run [cryptsetup luksOpen](https://man7.org/linux/man-pages/man8/cryptsetup-open.8.html) ? If it's not possible with GRUB, are there other bootloaders that support this? ### Notes Some distributions support [cryptdevice/cryptkey](https://wiki.archlinux.org/title/Dm-crypt/System_configuration#Using_encrypt_hook) parameters, however this [doesn't appear to be a standard linux kernel parameter](https://www.kernel.org/doc/html/latest/search.html?q=cryptdevice) (and isn't supported by the distribution I use). There is also the [dm-mod.create](https://www.kernel.org/doc/html/latest/admin-guide/device-mapper/dm-init.html) kernel parameter but it appears that it only supports cleartext passphrase (viewable from /proc/cmdline) or use a linux keyring entry. Both of these methods would need to decrypt the partition again in order for linux to mount it though, right? Or else why would they need the key?