Is it generally accepted in the relevant scientific communities that male IQ's exhibit more variance than female IQ's? I imagine this type of thing would be easy to verify via e.g. standardized test scores.
Yes, it is generally accepted. But people don't like it. For example it explains why there are more men in high-status positions, which again, people don't like, and try to rail against ("We need more women in XYZ!"). For an even more "untouchable" subject try: https://en.wikipedia.org/wiki/Race_and_intelligence
It's important to remember that high IQ and high-status positions don't correlate. High IQ is no indicator for success in live. If you actually measure people with higher societal status, you'll probably find quite a few with high IQ. But we must not interpret that in any way, because that's hindsight bias: We don't see all the high-IQ people not in high-status positions.
Psychologically, the more relevant variable for success in live is motivation.
(As a sidenote, IQ itself is by no means an objective measurement. The theories of intelligence are and were strongly influenced by the respective world views of its creators. Cattell for example, the inventor of fluid and crystallized intelligence, most probably differentiated between both as a way to explain racial differences: Everybody has crystallized intelligence, but only the white have highly developed fluid intelligence. He distanced himself from his early views a few months before his death, but the theory remained popular for many decades.)