Everyone anticipated that halving would be beneficial for the bitcoin price. Also, everyone knew that halving was happening, and when it was happening.
These two facts combined means that halving was already priced in well in advance of when it actually occurred.

Yes, we have seen bitcoin and alts all hit hard due to the initial economic shock of Covid-19... but this doesn't change the fact that halving was already priced in. We may see prices increases as economies come out of lockdown - but any increase in bitcoin price will be because of this, rather than halving.