There is no such thing as DA for 2D or even NPA approaches. It is MDA.
- maybe you want not to continue to MAPt after reaching it
- maybe you are required by regulation to "treat is as DA" and execute the MISAP without delay
- maybe you want to add a small buffer such as 50' on top, to make sure you do not go under.
But it still is MDA. No matter Jeppesen decided to print "DA" on their commercial product.
The items above are irrelevant if you just need to fly it. OTOH, when seeking understanding, sticking to the definitions would be prudent.
Based on ICAO Doc 8168 PANS-OPS.
https://www.faa.gov/documentLibrary/...AC_120-108.pdf