Yes using a thicker oil in your engine will sometimes help increase your engines oil pressure especially if your engine bearings are worn down and has resulted in an increase in the bearing clearances.
Your engine creates oil pressure due to the resistance between the bearings and the crankshaft journals.
When the clearances open up then it causes the oil pressure in an engine to drop even though the engine is getting oil to the bearings but it may not allow enough oil to get to the top of the engine where it's also needed.
Using thicker oil can help keep the oil where it's needed and create better oil pressure because the thicker oil will not thin up as much as the already thinner oil when the engine warms up.
As an engine warms up engine oil does naturally become thinner which allows the engine oil to flow faster through the engine which then leads to a drop in oil pressure.
Your engine normally should have 45 PSI to 55 PSI at highways speeds and around 25 PSI to 15 PSI at idle speed.
However some engines that get worn out will also naturally run at lower oil pressure.
If your oil pressure does actually drop to 0 PSI then you'll hear the lifters and valves clattering and you'll be able to shut the engine down before it causes any damage.
Also be sure to check your oil level because a low oil level can cause a drop in engine oil pressure as well or a faulty oil pressure relief valve on the oil pump.
Your oil pressure sensor can also go bad and show a low oil pressure reading when you really do have good oil pressure.