Ubuntu 22.04 server installer does not create btrfs subvolumes?

I installed Ubuntu 22.04 LTS server today and selected BTRFS as for the / partition. Here is the scheme I selected in the custom installation:

/boot     2G ext4/boot/efi 1G fat32SWAP      4G/         469.9G btrfs

From searching around, I saw that ubuntu used to create two separate subvolumes under @ and @home, but I don't see them when I check:

# lsblkNAME        MAJ:MIN RM   SIZE RO TYPE MOUNTPOINTSloop0         7:0    0    62M  1 loop /snap/core20/1587loop1         7:1    0  79.9M  1 loop /snap/lxd/22923loop2         7:2    0    47M  1 loop /snap/snapd/16292nvme0n1     259:0    0 476.9G  0 disk ├─nvme0n1p1 259:1    0     1G  0 part /boot/efi├─nvme0n1p2 259:2    0     2G  0 part /boot├─nvme0n1p3 259:3    0     4G  0 part [SWAP]└─nvme0n1p4 259:4    0 469.9G  0 part /

# cat /etc/fstab# /etc/fstab: static file system information.## Use 'blkid' to print the universally unique identifier for a# device; this may be used with UUID= as a more robust way to name devices# that works even if disks are added and removed. See fstab(5).## <file system> <mount point>   <type>  <options>       <dump>  <pass>/dev/disk/by-uuid/8b2ff495-b8b2-4959-a5a4-1f4aa7e85ffe none swap sw 0 0# / was on /dev/nvme0n1p4 during curtin installation/dev/disk/by-uuid/4466d07c-a9a8-452b-a970-667f55eff17a / btrfs defaults 0 1# /boot was on /dev/nvme0n1p2 during curtin installation/dev/disk/by-uuid/d15e9776-60c0-4e5f-b782-087126cfde2f /boot ext4 defaults 0 1# /boot/efi was on /dev/nvme0n1p1 during curtin installation/dev/disk/by-uuid/E1C9-D08B /boot/efi vfat defaults 0 1/swap.img       none    swap    sw      0       0

# mount | grep nvme0n1p4/dev/nvme0n1p4 on / type btrfs (rw,relatime,ssd,space_cache=v2,subvolid=5,subvol=/)

Did I miss something during installation?

I don't think this is a duplicate considering Ubuntu switched to the subquity installer recently, and the installation flow seemed to have changed from when the previous questions on this topic were answered.