A dealer or indi can code this, or you can find someone with NCS Expert and it can be coded that way.
I have this software, and did this on my car. It is just a setting within the General Module for auto lock after 2 minutes (if no door has been opened). There are other timings available as well I think.
There are plenty of other options you can code as well, search on here for other threads where there is a long list.
If you let us know where you are based, we can offer suggestions for the service. If you're close to me, I can do it for you.