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 E-flat Major Wq. 65-42 (H. 189) is one of the particularly captivating works among his keyboard music. This sonata demonstrates his unique expressiveness and emotional depth. The first movement begins with lively and energetic vigor, characterized by a strong rhythm that draws in the audience. The following second movement, "Adagio assai, sostenuto ed affettuoso," stands out with its profound emotion and delicate expression, offering a glimpse into Bachʼs inner world. The final third movement progresses briskly at a fast tempo, culminating in a brilliant finale. This sonata embodies Bachʼs innovation during the transitional period to classical music and the emotional depth inherent in his music.