NTA is optimized to only gather the top 95% of Neflow traffic coming from any source so you will not be able to see "All" traffic. You can change this setting in the NTA Setting under this section:
Image may be NSFW.
Clik here to view.
Image may be NSFW.
Clik here to view.
Image may be NSFW.
Clik here to view.
As mentioned above you can also edit the "Top XX" view resource and change the XX value to list more if you choose.