Where can I download a version for TC70X with Windows 10 IoT?
There is no version of DataWedge for Windows 10 IoT. If you visit the link posted below, you'll see all the available operating systems where DataWedge can be installed. Unfortunately, Windows 10 IoT isn't among them which makes it incompatible with the DataWedge as well.
Since there is no info about a possible Windows 10 IoT, contact the developers and they should provide additional details: https://www.zebra.com/us/en/about-zebra/contact-zebra/contact-tech-support.html