Real Economic Support That Acknowledges Unique Restaurant Assistance Needed To Survive Act of 2021 or the RESTAURANTS Act of 2021 This bill temporarily establishes and provides funding for the Restaurant Revitalization Fund, from which the Department of the Treasury shall make grants to eligible food and beverage purveyors to cover specified costs such as payroll, operational expenses, and paid sick leave. For the grant program's initial period, Treasury must (1) prioritize awarding grants to marginalized and underrepresented communities, and (2) only award grants to eligible food and beverage purveyors with annual revenues of less than $1.5 million in 2019. For tax purposes, grant amounts are excluded from the recipient's gross income. An entity that received a loan under the Paycheck Protection Program established to support small businesses in response to COVID-19 (i.e., coronavirus disease 2019) may not apply for or use a restaurant revitalization grant for the same expenses for which the entity received the paycheck protection loan. Further, a grant applicant may request an additional amount to cover the cost of providing 10 days of paid sick leave to its employees. Treasury must report a list of grant recipients with the amount each recipient received, as well as demographics and other specified information.