This site introduces unknown composer Emanuel Bach (C. P. E. Bach). This English version was translated from Japanese one by ChatGPT.
ChatGPT4o writes as follows (please note that it may not be accurate):
The Keyboard Concerto Wq. 26 and the Flute Concerto Wq. 166 are said to be arrangements of the Cello Concerto Wq. 170, which was originally composed for keyboard instruments. In this way, Emanuel Bach often adapted existing works to suit specific instruments. For more information about this piece, please refer to the description of the Keyboard Concerto Wq. 26.
This is the personal opinion of the creator of this site, but among Emanuel Bachʼs three cello concertos, this is the only one in a minor key, and it makes the most of the celloʼs sentimental tone. I believe it is an outstanding work, even compared to famous Romantic-era cello concertos.