he's dipped into the 30s several times already this year...that's within his 1st year on the job. If you're talking about their ratings at the 1st SOTU, Joey Bananas should take a hit for delaying to March. He'd be in the 30s if he'd done it "on time". Rules are different for dementia basement boy.
https://www.rasmussenreports.com/public_content/politics/biden_administration/biden_approval_index_history