Sorry, could not understand initially. I thought you linked 120mm HE-T as an example of MKEK capability so tried to answer it.
"So if they do it alone, it could be similar to another well known product."
Usually this happens for other calibres. For electronic parts they will need outside support (Aselsan, Roketsan, SAGE)
For long range rounds, if it would be crude tech, they can increase propellant for base bleed, increase barrel pressure etc, add static wings with the help of another company if they did not advance in-house capabilities.
Other option would be to reverse engineer or make a functional copy of another foreign product.
I'm just wildly guessing, don't take my word for it. I can't trust MKEK but would be very happy if it's possible.
MKEK definitely does not have the resources to develop or produce electronics or software. They are however mass producers of the shells, so will always have a part to play in the production process.
Tubitak SAGE are also working on another method for course corrected shells.
*the image is an Raytheon Excalibur 127mm* However, likely to be similar to what Tubitak SAGE/MKEK are working on for 155mm guided munition
It'll be interesting to see what 76mm guided shell will be like not sure how far along they are with that