Hi,
The answer of course is, it depends...
As pointed out earlier in the thread your optical system must be up to it, collecting extra photons but piling them up in a disk around the star doesn't really help.
So assuming the optics are OK, next up is the target, does it emit more in the NIR (limited to 700-1000nm for us amateurs using Si based cameras) than the background sky? The natural sky brightness increases dramatically as the wavelength increases, see Table 1 here:
https://academic.oup.com/mnras/article/386/1/47/976996
So the short answer is: your signal will increase with clear vs Lum, but your contrast might not.
Cheers,
EB