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 A Major Wq. 55-04 (H. 186) is a work that shines with his creativity and expressiveness. The first movement begins with lively and energetic vigor, possessing a compelling strength that draws the listener in. The following second movement flows with calm and deep emotion, offering a contrasting beauty. The final movement is marked by its light and flowing melody, bringing a fitting brightness and liveliness to conclude the piece. This sonata is a work that allows one to enjoy Bachʼs diverse musical expressions and demonstrates the richness of his compositional techniques.