J.D. Power recently released the April Automotive Sales Outlook report for the US, revealing a decline in electric vehicle market share between February and March 2023. EV adoption is still up slightly year-over-year, despite an increase in EV hesitancy thanks to a lack of charging infrastructure. https://www.notebookcheck.net/US-EV-market-share-declines-due-to-concerns-about-lack-of-infrastructure-according-to-J-D-Power-report.713167.0.html
I see 0 reason people would suddenly start worrying about infrastructure for a month. EV sales are up YoY during March. Month to month variations have always been a thing and many stuff can play a role such as uncertainty of tax credit qualifications or expecting other stuff. Even minor delays in delivery can cause issues. That is why quarterly numbers is really where it is at for judging
Plus, it wasn't that March 2023 was less than Feb 2023, the total is up. Just the % is slightly down for that 1 month