What is the ruling on the prayer of someone from whom an involuntary bubble of air exited from the anus during congregational prayer, and he suffers from waswasah (obsessive whispering), and he repeated the prayer as a make-up before Fajr by an hour?

As long as you know that you are afflicted with waswas (obsessive whispering), do not let Satan play with your heart. You must disregard everything you mentioned until you attain absolute certainty that leaves no room for doubt, for the Prophet, peace and blessings be upon him, said: "He should not leave until he hears a sound or perceives a smell." The default is that your prayer is valid, and you are not required to repeat it. What you have prayed is considered a nafl (supererogatory prayer), and do not repeat the prayer for that reason again, so as not to increase the waswas.