The U.S. Bureau of Labor Statistics (BLS) reported the share of remote workers fell from 35% to 11% from May 2020 to October 2021. Data is collected as part of the Current Population Survey to estimate the impact of COVID-19 on the workforce.
An important caveat to the data (emphasis mine):
Data refer to those who teleworked or worked at home for pay specifically because of the coronavirus pandemic. This does not include those whose telework was unrelated to the pandemic, such as those who worked entirely from home before the pandemic.