She has to take an enzyme pill before each meal that includes this group though. It's fairly harmless so she doesn't mind, it's just a bit of additional cost on our food.
If you're motivated, you can follow a protocol ("food challenges") to know which group(s) you're sensitive to. The idea is that you have a zero fodmap diet for a few weeks and then slowly reintroduce small amounts from each group and see how you react. It is not an easy task to figure out meals this way and to keep motivation so I'd recommend being helped by a dietician.
To the best of my gf's knowledge, there is no such enzyme for fructose intolerance unfortunately.
Also, if you want to know more about each group and which food is the most problematic in each of them, Monash has a great app for that. You've probably come across it already, otherwise search "Monash fodmap" on your app store. It's great to know if you can have a little bit of something or nothing at all and to educate yourself