Failed to remove container disk and reclaim space to main partition

After I removed Boot Camp I found out that the partition space didn't merge back into my main volume, instead it was called "container disk1". There was no option to delete it so I tried to initialize it and I renamed it "boh". Following the answer that was given to this question: How to remove a container disk and reclaim space with main partition?, I ran diskutil list and obtained

    /dev/disk0 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *251.0 GB   disk0
   1:                        EFI ⁨EFI⁩                     314.6 MB   disk0s1
   2:                 Apple_APFS ⁨Container disk2⁩         200.0 GB   disk0s2
   3:                 Apple_APFS ⁨Container disk1⁩         50.7 GB    disk0s3

/dev/disk1 (synthesized):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      APFS Container Scheme -                      +50.7 GB    disk1
                                 Physical Store disk0s3
   1:                APFS Volume ⁨boh⁩                     708.6 KB   disk1s1

/dev/disk2 (synthesized):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      APFS Container Scheme -                      +200.0 GB   disk2
                                 Physical Store disk0s2
   1:                APFS Volume ⁨Macintosh HD⁩            15.7 GB    disk2s1
   2:              APFS Snapshot ⁨com.apple.os.update-...⁩ 15.7 GB    disk2s1s1
   3:                APFS Volume ⁨Preboot⁩                 302.6 MB   disk2s2
   4:                APFS Volume ⁨Recovery⁩                1.1 GB     disk2s3
   5:                APFS Volume ⁨VM⁩                      3.2 GB     disk2s4
   6:                APFS Volume ⁨Macintosh HD - Dati⁩     115.9 GB   disk2s5

Then diskutil erasevolume free none disk0s3 and it returned:

The target disk is in use by APFS as a Physical Store; use diskutil apfs deleteContainer

so I ran diskutil apfs deleteContainer disk0s3 and now when I type diskutil list this is what I see:

    /dev/disk0 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *251.0 GB   disk0
   1:                        EFI ⁨EFI⁩                     314.6 MB   disk0s1
   2:                 Apple_APFS ⁨Container disk2⁩         200.0 GB   disk0s2
                    (free space)                         50.7 GB    -

/dev/disk2 (synthesized):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      APFS Container Scheme -                      +200.0 GB   disk2
                                 Physical Store disk0s2
   1:                APFS Volume ⁨Macintosh HD⁩            15.7 GB    disk2s1
   2:              APFS Snapshot ⁨com.apple.os.update-...⁩ 15.7 GB    disk2s1s1
   3:                APFS Volume ⁨Preboot⁩                 302.6 MB   disk2s2
   4:                APFS Volume ⁨Recovery⁩                1.1 GB     disk2s3
   5:                APFS Volume ⁨VM⁩                      3.2 GB     disk2s4
   6:                APFS Volume ⁨Macintosh HD - Dati⁩     115.9 GB   disk2s5

And now I'm scared that I messed it up. The volume doesn't either show up in Disk Utility.

I have a 2016 MacBook Pro 13-inch 4 TBT3, running MacOS Monterey 12.0.1 Thanks everyone in advance

The accepted answer the OP (user federico.jpg) was referring to has been updated. The version of the accepted answer that the OP read when posting the question can been seen here.

Since the question you referenced was posted, macOS has changed. You no longer have to enter the command below. This is the third command shown in the accepted answer.

diskutil erasevolume free none disk0s3

Instead, you just need to enter the command below, which is the final command shown in the accepted answer.

diskutil apfs resizecontainer disk0s2 0