This site introduces unknown Emanuel Bach (C. P. E. Bach).
ChatGPT4o writes as follows (please note that it may not be accurate):
The Symphony in G Major, Wq. 122-4 (H. 191) by Emanuel Bach is a work that showcases his creativity and rich emotional expression. The first movement begins with lively and energetic vigor, drawing the audience in with its strength. The following second movement exudes deep emotion and tranquility, creating a contrasting atmosphere. The final third movement returns to a lively tempo, concluding the piece with brilliance and dynamism. This symphony allows one to feel Bachʼs diverse musical expressiveness and offers a glimpse into his timeless innovation.
This piece is an arrangement for keyboard solo of the symphony Wq. 180 (H. 653), originally written for orchestra.
For each piece in Wq. 122, explanations are provided in "C. P. E. Bachʼs Posthumous Collection of Keyboard Pieces Wq. 122".