I have an Ortur Laser Master2 with a 15 watt module, so it should be fairly comparable to your settings.
Here is a piece I did on Red Alder. The lettering was 2600mm/min 60% power .1mm line interval one pass. Resulting in just over .5mm relief.
The picture of the leaf was 3000mm/min 45% power with .125mm line interval. I’m not very pleased with the image of the leaf, I would do more playing with the settings for this if I was going to make this for someone else, but it was more of a test for myself.
You can make an burn darker by slowing the speed down and lowering the power, or burn deeper by speeding up and increasing the power. Slowing down gives the wood more time to burn resulting in a deeper conversion to carbon, instead of ablating away and going up in smoke (the result of faster speeds with more power).
I do not have easy access to White Oak in this part of the country so I do not have any settings for that, but I would think it would take a little more power to get the same results. Red Alder is classified as a hardwood, but it is nowhere near as hard and dense as White Oak.