My opinion fwiw:
Void the season, no promotion, no relegation, all finish where they are, and standings and stats are recorded, but marked with an asterisk. Of course there will be those who benefit, and those who lose, but these are unprecedented times, there is no perfect solution, and this is by far the easiest to implement, without impacting on next season.
Abandon the remaining cup competitions, same as above, standings and stats marked and recorded. Its just one of those things, deal with it.
Hopefully, September will find the country in better shape, and we can start again.