lsblk: mount point in btrfs raid

Hi everyone,

in lsblk, I'm used to seeing the mount point for all devices in an mdadm raid, like so:

sdb                8:16   0  16.4T  0 disk
└─sdb1             8:17   0  16.4T  0 part
  └─md127          9:127  0  32.8T  0 raid5 /store/RAID_A
sdc                8:32   0  16.4T  0 disk
└─sdc1             8:33   0  16.4T  0 part
  └─md127          9:127  0  32.8T  0 raid5 /store/RAID_A
sdd                8:48   0  16.4T  0 disk
└─sdd1             8:49   0  16.4T  0 part
  └─md127          9:127  0  32.8T  0 raid5 /store/RAID_A

However, with btrfs raid, the mount point is only shown for the first device:

sdf              8:80   1  7,3T  0 disk
├─sdf1           8:81   1  7,3T  0 part
│ └─video_4b0  254:4    0  7,2T  0 crypt /mnt/video
└─sdf2           8:82   1   28G  0 part
sdg              8:96   1  7,3T  0 disk
├─sdg1           8:97   1  7,3T  0 part
│ └─video_5f2  254:5    0  7,2T  0 crypt
└─sdg2           8:98   1   28G  0 part
sdh              8:112  1  7,3T  0 disk
├─sdh1           8:113  1  7,3T  0 part
│ └─video_666  254:6    0  7,2T  0 crypt
└─sdh2           8:114  1   28G  0 part
sdi              8:128  1  7,3T  0 disk
├─sdi1           8:129  1  7,3T  0 part
│ └─video_9b1  254:7    0  7,2T  0 crypt
└─sdi2           8:130  1   28G  0 part

Where in the sysfs does lsblk obtain the mount point information? Is it possible that the btrfs module is lacking this information? I would like to understand why lsblk is lacking this information for btrfs.

Thanks in advance,
lukaro