This is what we found on Wikipedia regarding the Bridgerton Symphonic:

The Unofficial Bridgerton Musical is a concept album by Abigail Barlow and Emily Bear based on season 1 of the Netflix series Bridgerton. They developed the songs on the album on TikTok in early 2021 in a series of live sessions, during which they received and incorporated viewer feedback. Released in September 2021, the album charted on Billboard and elsewhere. It later won the 2022 Grammy Award for Best Musical Theater Album and was the first Grammy winner to be developed on TikTok. Barlow and Bear became the youngest nominees and winners ever in their Grammy category.

Barlow and Bear promoted the album by appearing at various venues and on television and online to perform songs from album. In July 2022, they organized a live concert performance of the musical at the Kennedy Center with notable guest soloists such as Kelli O'Hara. The same month, Netflix sued the two in U.S. federal court for copyright infringement and to prevent further live performances, but it dropped the suit in September after a reported settlement.