How can I recover my unused space which I merged with Main APFS(Encrypted)?

To increase the size of Main, I have merged the Main(Encrypted APFS) with another APFS partition. But now it is showing the previous size and I am not able to use the added space (See the size of Drive and Partition). /dev/disk0 (internal): #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme 121.3 GB disk0 1: EFI EFI 314.6 MB disk0s1 2: Apple_HFS Rana 12.7 GB disk0s2 3: Apple_APFS Container disk1 12.7 GB disk0s3 4: Apple_APFS Container disk2 69.8 GB disk0s4 /dev/disk1 (synthesized): #: TYPE NAME SIZE IDENTIFIER 0: APFS Container Scheme - +12.7 GB disk1 Physical Store disk0s3 1: APFS Volume Untitled 819.2 KB disk1s1 /dev/disk2 (synthesized): #: TYPE NAME SIZE IDENTIFIER 0: APFS Container Scheme - +69.8 GB disk2 Physical Store disk0s4 1: APFS Volume Main 62.9 GB disk2s1 2: APFS Volume Preboot 43.4 MB disk2s2 3: APFS Volume Recovery 510.6 MB disk2s3 4: APFS Volume VM 1.1 GB disk2s4