To be able to give a proof to your IT when you ecrypted your disk during the installation process (cf: Ubuntu 22.04 Enable full disk encryption )
First list all your current disk:
$ lsblk --fs
NAME FSTYPE FSVER LABEL UUID FSAVAIL FSUSE% MOUNTPOINTS
loop0 squashfs 4.0 0 100% /snap/bare/5
loop1 squashfs 4.0 0 100% /snap/chromium/2011
loop2 squashfs 4.0 0 100% /snap/chromium/2020
loop3 squashfs 4.0 0 100% /snap/core18/2409
loop4 squashfs 4.0 0 100% /snap/core20/1405
loop5 squashfs 4.0 0 100% /snap/core20/1518
loop6 squashfs 4.0 0 100% /snap/firefox/1232
loop7 squashfs 4.0 0 100% /snap/firefox/1443
loop8 squashfs 4.0 0 100% /snap/gnome-3-28-1804/161
loop9 squashfs 4.0 0 100% /snap/gnome-3-34-1804/77
loop10 squashfs 4.0 0 100% /snap/gnome-3-38-2004/99
loop11 squashfs 4.0 0 100% /snap/gnome-3-38-2004/106
loop12 squashfs 4.0 0 100% /snap/gtk-common-themes/1534
loop13 squashfs 4.0 0 100% /snap/slack/62
loop14 squashfs 4.0 0 100% /snap/snap-store/575
loop15 squashfs 4.0 0 100% /snap/snapd/15177
loop16 squashfs 4.0 0 100% /snap/snapd/16010
loop17 squashfs 4.0 0 100% /snap/snapd-desktop-integration/10
loop18 squashfs 4.0 0 100% /snap/snapd-desktop-integration/14
loop19 squashfs 4.0 0 100% /snap/tandem/23
loop20 squashfs 4.0 0 100% /snap/snap-store/582
nvme0n1
├─nvme0n1p1 vfat FAT32 A800-DBD2 476,5M 7% /boot/efi
├─nvme0n1p2 ext4 1.0 1ac0f3f1-c58a-4c4f-837f-116391766753 1,3G 15% /boot
└─nvme0n1p3 crypto_LUKS 2 e246412e-d52e-4ad2-8ca7-b9f04bb7842f
└─nvme0n1p3_crypt LVM2_member LVM2 001 nboAwJ-dnUP-oeuV-Tg7e-OwVw-z0BH-IDzAN0
├─vgubuntu-root ext4 1.0 39a942f6-7e41-4c16-9b0c-bcff9f2c785b 414,9G 6% /
└─vgubuntu-swap_1 swap 1 6b792227-3ad3-4f38-b9aa-435a201281a4 [SWAP]
It's the nvme0n1p3 which - in my case - is the encrypted device.
Then you can just use cryptsetup to display the details:
$ sudo cryptsetup luksDump /dev/nvme0n1p3
LUKS header information
Version: 2
Epoch: 3
Metadata area: 16384 [bytes]
Keyslots area: 16744448 [bytes]
UUID: e246412e-d52e-4ad2-8ca7-b9f04bb7842f
Label: (no label)
Subsystem: (no subsystem)
Flags: (no flags)
Data segments:
0: crypt
offset: 16777216 [bytes]
length: (whole device)
cipher: aes-xts-plain64
sector: 512 [bytes]
Keyslots:
0: luks2
Key: 512 bits
Priority: normal
Cipher: aes-xts-plain64
Cipher key: 512 bits
PBKDF: argon2id
Time cost: 9
Memory: 1048576
Threads: 4
Salt: 46 cb 22 9a de 2b 07 5d c4 81 14 4f f2 e5 4c 87
94 35 1e 92 88 d5 63 5c 26 7d dc 33 50 fe bd fd
AF stripes: 4000
AF hash: sha256
Area offset:32768 [bytes]
Area length:258048 [bytes]
Digest ID: 0
Tokens:
Digests:
0: pbkdf2
Hash: sha256
Iterations: 299593
Salt: 12 f1 4b 5b d1 ad ff ef 42 16 f7 a3 56 09 05 a8
83 0e e7 c1 7c be 99 ff 55 5e 90 49 6c 99 64 4a
Digest: cc 2c cd e1 75 dc c7 ed c9 c8 9f 25 d5 1d f8 2b
48 9c fc 4f c5 ad 76 0c 6d 6d 3a 7c b2 71 4e 34