If you know for sure that wind is passed then your wudu is broken even if you did not hear the sound or felt the smell. This rule applies only if you are in doubt.
https://www.assimalhakeem.net/i-have-problem-of-fartswinds-i-in-salah-control-them-by-not-allowing-them-to-pass-out-does-that-invalidate-wudu/
If you can’t control it, you should take the same ruling as those suffering from incontinence.
https://www.assimalhakeem.net/purification-and-prayer-for-one-who-has-urinary-incontinence-i-feel-that-some-drops-of-urine-come-out-i-asked-about-prayer-and-i-was-told-to-do-wudoo-at-the-time-of-each-prayer-and-then-pray/

i’ve heard that a wudu is broken if one farts by releasing sound or smell, i have gastritis, i always feel like i am releasing wind without sound or smell.so is my prayer invalid,and at the same time if i take wudu 4the second time and pray, again fart comes,(is it ok and permissible to control fart without letting the wind pass and pray always ?is my prayer valid?