There is no mandatory instruction like that. In the early days of the pandemic last year, the government issued guidelines for the continued payment of salary despite the lockdown. The matter went to the Supreme Court, and by way of an interim order dated June 12, 2020, it directed that private establishments, industries, and employers, who are willing, may negotiate terms and enter into settlements with their workers and/or employees regarding payment of wages for the period with effect from the MHA order till May 18, 2020 (the "50 Days Period") or for any other period as applicable in any particular state during which their industrial establishment(s) was closed down due to the lockdown.
In an earlier order, in the petitions filed, dated June 04, 2020, the central and state governments were directed not to take any coercive steps against private employers who have not paid full wages to their workers and/or employees during the lockdown. Thereafter, it appears the government also soft-pedaled these guidelines.
There is no news on what happened subsequently in such matters.