You can try changing the pointer from a white pointer to any of the other 3 color options (settings > accessibility > mouse pointer and touch > mouse pointer and style - options are white, black, inverted, custom). You can also increase the size to 2 or larger in that same section. Or you can change the pointer size to 2 or larger in settings > accessibility > text cursor thickness. All should make things visible again. Black seemed like the best choice since I prefer a smaller pointer and text selector icon.