“a senior Defense Department official said that Chinese spy balloons entered American airspace three times during Trump’s tenure and once before during the current administration.”
…
“the difference between past instances and the one from last week, Defense Department officials said, is that those balloons never stayed above U.S. territory for a significant period of time. When pressed for specifics, such as the date, location and duration of those instances, Biden administration officials refused to provide them to POLITICO, citing the classified nature of that information.”
https://www.politico.com/news/2023/02/05/trump-officials-deny-chinese-spy-balloons-00081257