while the liberals could call an election before ford does, they'd have to engineer it. unless he cancels it in a fit of fascist domination (which is looking increasingly unalarmist week by week), ford will need to call an election on schedule about a year from now.
the federal ndp will also benefit from a reduction of anti-ford kneejerking.
so, it's in the opposition's best interests to just wait it out and prop them up until mid-2022 at the earliest, and the pandemic gives them the perfect cover to do it.