It's unlikely to achieve anything, the issue will be dust clogging the very tightly-packed heatsink fins and the thermal paste/pads becoming less effective over time. Both those things would require a teardown to remedy.
A can of compressed air into the rear and side vents might help a bit but the PSU is in the way so it's impossible to actually clear out the heatsink properly without dismantling the console first.
If you scroll to Step 7 here, in the second image you can see the PSU towards the back of the console (being lifted out), the heatsink and then the fan in front.
https://www.ifixit.com/Teardown/PlayStation+4+Pro+Teardown/72946