Might just be a bias in your reading? I was just having a similar conversation about books with portals/unexpected journeys and the list seemed more 50/50
Just off the top of my head
The phantom tollbooth James and the giant peach Charlie and the chocolate factory/ the great glass elevator Whine the pooh Gulliver’s Travels
All have male MC
Monkey and a dart board. It’s best not to take Goodreads too seriously, I basically just use it to organize my own reading