He made high-profile appearances in early 2019 on Solange's When I Get Home and the Vampire Weekend single "Sunflower." That May, shortly after he appeared on Martians' The Last Party, Lacy released Apollo XXI, his first solo LP. It landed on the Billboard 200 and was nominated for a 2020 Grammy. Also that year, he released the non-album single "Live Without Your Love" with Love Regenerator. As a producer and featured artist, Lacy was one of the key contributors to Ravyn Lenae's Hypnos, issued in May 2022, and the next month issued the Brazilian jazz-funk-infused "Mercury," the first track off his second album, Gemini Rights.