By the time we traveled to Peru in late April 2022, Peru was no longer requiring fully vaccinated visitors to have a COVID test before entering the country. The Peruvian COVID requirements did require us to submit an Affidavit of Health and Geolocation Authorization before being allowed to fly to Peru.
We also were required to wear a KN95 mask or double masks in many places in Peru. The documentation stated, "The use of a KN95 mask or, alternatively, a 3-fold surgical mask with a fabric mask, is mandatory for being on public roads and in enclosed spaces." Face shields had formerly been required for riding the train to Machu Picchu, but that restriction was removed before we got there (KN95 or double masking still required).
This sign was posted inside one of the three elevators at our Lima hotel, but I think it was from prior months because it wasn't displayed in the other two elevators.
Marketplaces, stores, restaurants, and other facilities had postings on rules related to COVID-19.
The most stressful part of traveling to Peru during COVID-19 was the need to have negative COVID tests to return home to the United States. Gate 1 Travel arranged for a doctor to visit us at our Lima hotel the day before we departed Lima. It cost 110 soles (~$30 USD) per person for the test and we were relieved that we both tested negative!