Got a reference? Because my Zen3 desktop has the driver loaded and information shown, just not the bitflips but that may be due to excessively early refresh configuration.
Normally you should not see any bit flips, because they happen at intervals of several months or even less frequently, depending on location.
Only for some old modules, e.g. 5-years old or older, the frequency of errors can increase a lot, even up to many bit flips per day, which means that the offending module must be replaced.
This feature of identifying the aged modules is one of the main benefits of ECC.
I have not looked again at the AMD EDAC driver, which has been updated during last year, but previously, a couple of years ago, its feature of injecting errors for testing was broken on Ryzen (because it had not been updated since Bulldozer, at that time), so the only method to verify that error reporting is working was to overclock the memory in the BIOS settings, to ensure that errors will be generated. Obviously, for the test one should boot from read-only media, to avoid the corruption of the storage in the case of excessive errors.
