Does that answer your question?
No, it doesn't answer if it'll be the same for all sports. As others have pointed out archery, shooting, curling, and other sports have men an women competing either separate or together and women can compete at the same level.
As for football, yes, there's a good chance there'll be stark differences, but as I pointed out in another comment, not every sport is about raw strength. And, competing against stronger opponents can also raise your ceiling. How far is of course yet to be seen because we don't have mixed leagues.
And again, the suggestion isn't "NO MORE SEGREGATION EVER" it's "should we let them compete against each other". That means there'll be a mixed and segregated league. Maybe even, as somebody else suggested, the segregations wouldn't always be immediately by sex or gender, but by attributes that make sense in that sport e.g weight, muscle mass, height, skill, and so on.
OK, I'll just add an edit to the description, but for you too: the suggestion isn't to force desegregation. It's to allow it. Someone else made a better suggestion: segregate by attributes specific to the sport. In boxing it's weight class, in basketball it could be height, in biking it could even be doped and non doped. Sex and gender need not be the very first thing to segregate by.
Finally, the option to compete together should still be the default, IMO. Some people probably would like to join a mixed team, but simply can't because it isn't allowed. For example if basketball were segregated by height, some shorter players would maybe like to play in the mixed team regardless (maybe they hit a skill ceiling in their league, maybe they don't like the idea of segregation, etc.).