The mdadm command with the --examine option can be used to examine a partition.

mdadm --examine /dev/sdb1

Something like this should be returned.

/dev/sdb1:
          Magic : a92b4efc
        Version : 1.2
    Feature Map : 0x1
     Array UUID : db6713ad:66881ca7:48e01e17:6f0a0053
           Name : www.example.com:root
  Creation Time : Sat Mar 26 17:23:25 2016
     Raid Level : raid1
   Raid Devices : 2

 Avail Dev Size : 3860856832 (1841.00 GiB 1976.76 GB)
     Array Size : 1930428416 (1841.00 GiB 1976.76 GB)
    Data Offset : 262144 sectors
   Super Offset : 8 sectors
   Unused Space : before=262056 sectors, after=0 sectors
          State : clean
    Device UUID : d18980d6:b3710ba9:5f3e4f24:a1bd3519

Internal Bitmap : 8 sectors from superblock
    Update Time : Wed May 12 19:43:05 2021
  Bad Block Log : 512 entries available at offset 72 sectors
       Checksum : 8f05083d - correct
         Events : 209562


   Device Role : Active device 0
   Array State : AA ('A' == active, '.' == missing, 'R' == replacing)