Gender and Biological Sex
Science cannot say gender and sex mean the same thing. Science can determine what biological sex is. It's up to society to determine if gender is the same as biological sex or if it covers things biological sex does not.
Now if society tries to say biological sex of XY chromosomes can be male or female, which many wokers make the mistake of doing, it fails the scientific method. In turn, the anti-wokers jump on that mistake, trying to correct them that biological sex cannot be male or female, but because of their bias, they make a similar mistake by saying it applies to gender too. Science never said that. Science can't say that about gender. Science can only say it about biological sex. It's up to society to determine what gender is.
The anti-wokers need to get over the fact that gender is a social construct which involves terms such as boy, girl, man, woman, he, she, etc, and is malleable depending on what the majority opinion is.
The wokers need to get over the fact that a male cannot be female and a female cannot be a male (well until science can alter chromosomes which will happen some day) because those are hard-line biological sexes backed up by scientific method.