Why Did I Buy A Sliding Door With Only One Door Handle?

Why did I buy a sliding door with only one door handle?
What you know from your description is, and it must be: the sliding door you choose is a two-track, two sliding door.
Professionally speaking, the standard configuration of two-track and two-sliding door factories is generally only equipped with a large handle. It's just that the other door handle is not a handle to you.
The big handle is usually installed on the side near the outside, on the outdoor track; the one near the interior is actually equipped with a handle, and it is a handle with lock. We usually call it "Flat Lock", "Hidden Lock", "Side Lock", etc .; The hidden lock is usually on both sides of the indoor sliding fan. There is a lock on one side, but there is no lock on the other side but it has a decorative effect, and it is also convenient. User push-pull effect.
The design of the sliding door to be equipped with two large handles or even four large handles is:
Two tracks and four fans or Three tracks and six fans