well, men's Team Epee is so far the weapon with more decisions still to be taken...
France and Italy are mathematically qualified through the World Ranking, as well as the USA are also already qualified to the Tokyo Games because of the Panamerican Continental spot...
everything else, it's still open...
right now (1 event still to go), Switzerland and Ukraine would be in through the World Ranking, South Korea thanks to the Asian continental spot and Hungary thanks to the European continental spot (Egypt only need to stay within the top 16 of the WR, currently they are 14th and they have to keep at least 2 between Estonia, Spain and Germany behind them to qualify, which however it won't be easy, as they are only a few points behind Egypt and they all have the chance to earn more points than the Africans in the last WC stage)...
on the other hand, South Korea have an awful score of 8 points to be discarded, meanwhile Switzerland so far have 25 points as their worst result, Ukraine have 23, Hungary have 24 and Russia (who are the first out among the european teams, just 3 points behind HUN) only 21...
all this, means that KOR are most likely to gain the 4th World spot after the last event and cause an earthquake among the remaining european teams, which are likely to lose a spot in favour of the second best Asian Team (Japan are 3 points ahead of China right now, but CHN have 8 points to be discarded and JPN have 25, which means that virtually CHN are 17 points ahead before the last competition)...
so, considering the current standings and the whole "game" of discards, I think SUI are the heavy favourites to stay in the top 4 overall among the European teams and therefore to qualify to Tokyo 2021 as they still have quite a good margin in the standings over their direct rivals...
KOR are also likely to sneak in into the top 4 overall, so giving a second Asian team (China rather than Japan, unless they make up at least 18 points on CHN in the last event) a place at the Olympics...
imho, also Egypt are going to save their place somehow and therefore the fight for the European Continental spot is on between UKR, HUN and RUS, with UKR having to defend a 24 point lead over HUN and 27 over RUS...
The full current Ranking is here, so you can make yourself all the calculation about the projected scores...
https://tokyo2020.fie.org/ranks?weapon=E&gender=M