Season 5B of "Lucifer"'s premiere date is May 28th 2021 on Netflix. The show is already renewed for season 6 with a release date to be confirmed, most likely end of 2021 or beginning of 2022.
Lucifer season 6 is going to be the FINAL season so there will not be a season 7.
The Devil has come to Los Angeles… In "Lucifer", LUCIFER MORNINGSTAR (Tom Ellis) is a bored and unhappy devil. He has abandoned his throne to retire to L.A., where he runs Lux, an upscale nightclub. This devil is charming, charismatic and devilishly handsome, and loves to indulge in his favorite hobbies including wine and women. However, a pop star is brutally murdered outside of Lux. For the first time in roughly 10 billion years, he feels something awaken deep within him as a result of this murder. Compassion? Sympathy? The very thought disturbs him, as well as his best friend and confidante, Mazikeen aka Maze (Lesley-Ann Brandt, “The Librarians”), a fierce demon in the form of a beautiful young woman. The murder attracts the attention of LAPD homicide detective Chloe Dancer (Lauren German, “Chicago Fire”), who initially is dismissive of Lucifer. But she becomes intrigued by his talent for drawing out people’s secrets and his desire to dispense justice, doling out punishment to those who deserve it.