A little history here, during FreePBX 13 (or maybe it was with the release of FreePBX 14) was the first time direct parking was enabled natively within FreePBX. Prior to that you had to add custom dialplan.
So there is a reason for these older threads. But if you reply to an older thread, pay attention to the age and versions.
Edit: It was FreePBX 12 where direct parking was added natively. I completely skipped 12, so I tend to forget it existed.