A discussion on the Crosstrek forum about how acceptable oil levels may or may not affect oil pressure.
Here's a little snippet.
Too little oil causes over working of the pump and inadequate oil quantity to properly coat all engine components at the same time for a prolonged period, leading to increased heat from friction that the cooling system must counteract, as well ad increased wear on those parts not properly lubricated.
Model Years 2018 to 2023 - Oil amount and its effect on...
www.subaruxvforum.com