Its not. Here is the paper. https://www.science.org/doi/10.1126/sciadv.adu8826

To summarise, photosynthesis increases the amount of molecular oxygen in the atmosphere. It doesn’t create oxygen atoms. Those come, in the recent geological era, from inside the earth in the form of volcanic oxides. The paper suggests that something about the magnetic field influences the rate at which those oxides are belched into the atmosphere.

You successfully removed all remaining clarity.

Plate tectonics means volcanoes i guess is the last detail.

I thought we were talking about play tectonics: the gradual shifting landscape of play

it isn't. read the paper