After tuning flow and pressure advance, you may still have some pinholes where your top infill meets your perimeters. This is more prevalent in PS/SS.
This is not necessarily an indicator that your flow or pressure advance are wrong, though they can impact it.
Some people have widely varying overlap settings. You will need to tune this for yourself. I am still figuring out why it varies between people. It may be impacted by line width, but I have not yet tested this theory.
Simply increase "infill/perimeter overlap" (PS/SS) until satisfied.
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Some use "not connected" for their top infill. This does resolve the pinholes, however I find this to cause the opposite problem. It overshoots.
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To resolve this overshoot, you then need to lower your overlap. And because overlap is a global setting, this also starts to affect sparse infill/perimeter bonding - and therefore affects print strength.