I don't think there is any sports that fixed games or matches don't occur. It is rampant in football especially in some part of American, Africa and Europe. I know a punter who gives correct score everytime and it wins.
I don't think baseball is rigged, nor football. They're far too competitive too big rigged. Same thing with soccer. Maybe boxing. I don't see how mike tyson lost that fight with Jack paul. he should have knocked his ass out.
I have some of those concerns for high-stake sports like boxing or even football. Although it's so hard to prove, but there have been multiple cases with dubious officiating or some kind of unusual betting that raised concerns.
I know that football matches can be fixed for backwater leagues. It can't be fixed for big and popular leagues. A attempt to do so would always leak. Do you see how European league matches are scrutinized by the media? You can't fix it. But I am certain that all those lowly rated leagues might have incidents of fixed matches.