The purpose of this study is to determine whether certain interventions can help treat sleep disturbances that started or worsened following a COVID infection and have lasted for at least 12 weeks. Sleep disturbances include excessive drowsiness, problems falling and staying asleep, and problems with sleep-wake patterns. These disturbances are known to be associated with post-acute sequelae of SARS-CoV-2 infection (PASC) or Long COVID. This study will examine the effects that the interventions may have on the ability to recover from sleep disturbances associated with Long COVID. Participants will be adults who experience sleep disturbances as a symptom of Long COVID and who have not had another COVID infection in the last 4 weeks. They will also be screened and assigned to a sub-study that best matches the type of sleep disturbance they are experiencing. Each sub-study contains 1 or more active study intervention group and an inactive study intervention group. An intervention could include a study drug, a study device, a behavioral approach, or a combination of these interventions.