Bleeding air from the line won't change the gauge reading. The static pressure in the tube doesn't change with air present. The air compresses, taking up less space, but that doesn't affect the pressure.

Cheap gauges are notoriously inaccurate. So there is that to consider.

But there is also the matter of wear. Tain't a new engine, and things wear. The stock oil pump never was a high capacity unit, and they always dropped oil pressure quite a bit at idle. With time, those values will drop even lower.

You could consider replacing the bearings, or ignoring it until the engine spins one. And the latter may not happen for several hundred thousand more miles.