https://www.newsweek.com/how-joe-biden-approval-rating-affected-documents-scandal-1774353
A collection of polls collated by FiveThirtyEight also suggested the January 9 discovery had little impact on Biden's popularity.
On January 8, the poll aggregate put gave Biden's an approval rating of 43.5 percent, vs. 51 percent who disapproved. Five days later, on January 13, his approval had risen slightly to 43.9 percent, while his disapproval fell to 51 percent.