This site introduces unknown Emanuel Bach (C. P. E. Bach).
ChatGPT4o writes as follows (please note that it may not be accurate):
Emanuel Bachʼs Sonata in F Major Wq. 65-21 (H. 52) is one of the particularly captivating works in his keyboard music. This sonata consists of three movements, each possessing a distinct character. The first movement is lively and bright, filled with an energy that draws the listener in. The following second movement has a calm and introspective nature, expressing deep emotions. The final third movement is characterized by a singing melody, with elegant and flowing music unfolding. This sonata exemplifies Emanuel Bachʼs unique expressiveness and serves as a bridge to the Classical period, showcasing his musical innovation.