I don’t know if defect inspections in a new building are standard practice but they are a very good idea.
Currently the time limit for claiming rectification of non-major defects is two years (and major defects six).
Non-major defects are basically anything that needs repair but doesn’t mean the building or apartments in it can’t be occupied. Cracked tiles or ceilings, leaking roofs, wobbly balcony balustrades etc etc etc all come under “non-major”.
Your EC is to be congratulated on getting on top of this before time runs out.