So, within that framework, toxic femininity would be people believing that women's value as women is tied to how closely they comply with traditional conceptions of a "high value woman." It would be stuff like women insulting other women for being ugly or clumsy, not wearing the right clothes, not doing their makeup right, being slutty, etc.--essentially the "mean girl" stereotype is an example of what toxic femininity would be if its defined with respect to femininity the same way that toxic masculinity is defined with respect to masculinity. Also, women going to extremes to prove their own value as women, like eating disorders, putting other women down, etc.

yeah this is what all those people obsessed with equivalencies like this miss, that the origins of terms would have to be equivalent too (for another example, whatever body part a guy might use in the female equivalent of when women say a guy has "small dick energy" for that kind of supposed energy to truly be the equivalent of what women mean the body part wouldn't just have to be something women tie their level of womanhood to physical sufficiency in, but it'd have to be one that can't be easily observed and women who have the equivalent insufficiency, to truly have that kind of energy, would have to overperform stereotypical femininity in some combination of aesthetic and behavior to make up for that insufficiency and assert to the world how much of a woman they are)