While I don't know about his particular device, newer Samsung devices tend to permanently disable features (like the camera in the Fold devices) when you root them.
Snapdragon versions are usually harder to root, and my carrier s21u here in Canada does not even have the bootloader unlock option that exynos versions do. But Exynos are always worse when it comes to thermals, camera quality, and performance. So the choice is often between a much more performant but locked Snapdragon or a more open phone but with the sometimes atrocious downgrade that comes with Exynos SoCs. Exynos used to be harder for custom roms to get right, but I think that's not the case anymoee.
Even if your device lets you root it (many don't), you will trip the "Knox fuse." It's a small fuse inside the CPU that permanently burns out if you root, and permanently blocks Samsung Pay, Secure Folder, a few other Samsung security apps... and on the Galaxy Z Fold 3, your camera (though on the Z Fold 3, apparently, if you re-lock your bootloader the restriction goes away). Also said fuse cannot be reset so if you reinstall completely stock firmware, it's blown forever.
It seems that most Samsung phones are locked down in the US. Other models have no issue besides KNOX tripping.
KNOX tripping only disable some features you probably won't need unless you have a corporate phone, and you probably shouldn't mess with these anyways. At least in Europe, tripping KNOX doesn't void your warranty.
I'm looking forward to when my wife upgrades her phone, so I can root the S10e.