This is anecdotal, but during Singapore's lockdown, one of the many services cut for about two months was curb maintenance. Being deep in the tropics, all green spaces immediately turned into jungles of flowers and weeds, and the butterfly population consequently exploded:

https://mothership.sg/2020/06/grass-cutting-butterflies/

https://www.bbc.com/news/world-asia-52960623

On the other hand, mosquito populations also increased and there were lots of people stuck at home as bait for them, contributing to Singapore's worst dengue outbreak in years:

https://www.tnp.sg/news/singapore/three-more-dengue-deaths-s...

So at least one lesson here is that, if given an opportunity to bounce back, many insect populations can and will.