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 B-flat Major Wq. 65/34 (H. 152) is one of the particularly captivating works within his keyboard music. This sonata demonstrates his unique expressiveness and emotional richness. The first movement is characterized by its grand and pompous nature, featuring a strong rhythm and clear melody. The following second movement is notable for its singing melody, evoking deep emotions. The final third movement has a lively and spirited atmosphere, bringing the piece to a bright conclusion. This sonata showcases Bachʼs innovation during the transition to the Classical period and highlights the influence his music had on later composers.