My technique is come in at a sharp angle, aim for the porcelain and not the water/drain/cake. 98.5% of the time this results in no discernible splashback, for me at least. If there is splashback, it’s usually due to the design of the fixture itself and I quickly adjust to compensate - some are more shallow or rounded, others are awkwardly curved or angled, and the height at which it’s mounted matters as well.

You might just be unlucky and have a super powerful stream or something. If that’s the case, you’re probably better off just sitting to pee.