You’re right:
Cattle are ruminants, meaning their digestive system is highly specialized to allow the use of poorly digestible plants as food. Cattle have one stomach with four compartments, the rumen, reticulum, omasum, and abomasum, with the rumen being the largest compartment. The reticulum, the smallest compartment, is known as the “honeycomb”..
https://en.wikipedia.org/wiki/Cattle
I saw one story about a supposed methane explosion in a barn in Germany that housed a herd of dairy cows. Since this this appears to be the only incident that seems to have ever been blamed on methane from cows causing an explosion in a barn... It can safely be assumed that whatever happened in that barn had nothing to do with emissions from the cows.
If we didn’t already know how gullible people are about things that they have no experience with, it would be hard to imagine how they could believe all of the nonsense associated with the global warming scam. But the biggest nonsense of all is blaming one group of four legged grass eating animals for having any effect at all on the temperature of the earth. There are billions of other animals living in the world who live mostly on grass and other plant life... their digestive systems may not be exactly the same as cows, but their digestion works on the same principles and I assume that their emissions of methane per pound of consumption is very similar.
This is all 100% nonsense brought to you by the same scam artists that were claiming that polar bears were going extinct while the actual numbers showed their population was increasing. It doesn’t matter how much they lie because when they are caught they just move on to the next lie and most people keep believing the old disproved lie anyway.