Floor coverings can be agreed by the committee but there can be issues if there aren’t clear guidelines for things like noise insulation (underlay). If there have been other issues with noisy floors, the strata manager may be trying to enforce stricter standards or even just make owners realise that there are standards that need to be met.
The strata secretary can call a general meeting at any time and your strata manager may have delegated powers to act as secretary.
If you don’t have clear guidelines, then you should be looking at passing a by-law to create some.