Leendert,
Found this article on the B-32:
https://nationalinterest.org/blog/re...minator-188717
They did have a 20% longer range than the B-29 (with the same bomb load).
When based in the Philippines they did fly some combat missions over Formosa and the Philippines. They were then moved to Okinawa but apparently only flew recon missions over Japan. The last airman killed in the war, Sergeant Anthony Marchione, was in a B-32 making a photo recon run over Tokyo on August 18th, 1945. The plane was attacked by Japanese fighters.