Many of the researchers are currently studying the various aspects of the issue. Hopefully, by the end of the year there will be an ocean of publications.
Changes in Dietary Behaviours during the COVID-19 Outbreak Confinement in the Spanish COVIDiet Study: Article Changes in Dietary Behaviours during the COVID-19 Outbreak C...
the research I have carried out together with Carla Cavallo and Valentina Carfora on the changes in consumption patterns that occurred due to the Italian lockdown and how evolutions in behaviour are intertwined with the evolution of the main Italian food supply chains has just been published.
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Article Resilience effects in food consumption behaviour at the time...
Compliment of the season. As regards your questions, though not aware of what your objective(s) is(are), you can read this article, maybe it could help.
Hungry birds do not sing: Coronavirus and the school feeding program by