Toyota Tundra oil pressure

I have a new-to-me 2013 Tundra. When I first start it and when the engine is under load, the oil pressure gauge goes up pretty significantly. It doesn’t go to 3/4, but maybe 5/8 or a little more.
I changed out the oil for 0W-20 since I’d read that it’s pretty common to run the wrong oil, but that didn’t seem to fix the issue.
Is this normal?

EDIT: adding more info. My question is basically "is this fluctuation normal?". My old truck was a Dodge Dakota, and once it had run longer than a minute or so the needle was dead on 50% pressure and stayed there pretty much no matter what. The Tundra goes up nearly to 75% on startup and idle (until it’s run for a good five minutes) and it also pops to maybe 60% when I’m accelerating or on a hill. Cruising it actually drops slightly below 50% on the gauge.