The gap between productivity and wages has indeed grown, but that doesn't mean the same thing as Real Wages (adjusted for inflation) stagnating, as they have not done that.
Again, your chart shows two decades of stagnation, a small bump in the late 1990s, 15 more years of stagnation, and a bit of a recent runup (with obvious COVID outliers).
If you plot it with the Y-axis starting at 0 instead of 300, it'd looks even flatter. (See my link.)
