For the Canon EOS 1300D, you can see the calculated DLA of f/6.8 at that camera's review at [The-Digital-Picture][1]. Bryan also has a [short article][2] about what DLA is and how it affects images.

All of the Canon cameras reviewed at The-Digital-Picture since about 2004 or so have the calculated DLA listed. It's included in the "Specifications" list for each camera. There's also a chart in the main body of the review that will show DLA along with other sensor specifications and compare them to other similar cameras. The list for the Rebel T6/1300D is fairly brief. If one looks at the list included in the review for, say, the [EOS 5D Mark III][3], there are a lot more sensors with varying pixel sizes in the comparative list.
 
Since DLA for a digital sensor is strictly a function of the size of its photosites (a/k/a pixel wells), any other camera with the same pixel pitch should have the same DLA. Even if you are interested in the DLA of a non-Canon sensor, as long as the camera in question has a Bayer mask in front of the sensor it will have the same DLA as a Canon camera with the same pixel pitch. 


  [1]: https://www.the-digital-picture.com/Reviews/Canon-EOS-Rebel-T6.aspx
  [2]: https://www.the-digital-picture.com/Canon-Cameras/Diffraction-Limited-Aperture.aspx
  [3]: https://www.the-digital-picture.com/Reviews/Canon-EOS-5D-Mark-III-DSLR-Camera-Review.aspx