As of February 15 The U.S. will end it's COVID-19 Public Health Emergency (PHE) on May 11, 2023.

Under section 319 of the Public Health Service (PHS) Act, The Secretary of the Department of Health and Human Services can declare a Public Health Emergency (PHE) if he determines, after consulting with such public health officials as may be necessary, that 1) a disease or disorder presents a PHE, or 2) a PHE, including significant outbreaks of infectious diseases or bioterrorist attacks, otherwise exists.
They can be national or limited to a state or states.
The Stafford Act authorizes the President to provide financial and other assistance to state, local, and tribal governments, certain private nonprofit organizations, and individuals to support response, recovery, and mitigation efforts following Presidential emergency or disaster declarations.
They have occurred recently for the Opioid Crisis, Wildfires, Tropical Storms and Hurricanes, Floods, Earthquakes, It must be renewed every 90 days or it will end.
The COVID-19 PHE was originally declared on January 31, 2020 and has been renewed every 90 days since as of Fevruary 2023.

On March 13, 2020, by Proclamation 9994, the President declared a national emergency concerning the coronavirus disease 2019 (COVID-19) pandemic.

Public Health Emergency Declaration Q&As | PHE.gov

I couldn't find a good description of what the COVID-19 PHE entails. it may vary state by state.

State Actions and measures under the current emergency order.
States’ COVID-19 Public Health Emergency Declarations

What changes when the PHE is lifted?
COVID-19 PHE Transition Roadmap | HHS.gov