if they just want to register the product on the Cosmetic Product Notification Portal, then ranges will be sufficient, though there are certain prescribed ranges you have to use (0.1-1%, 1-2.5% etc.)
though as @LianePamuspusan said, if you want to get it safety assessed in accordance with Annex I of the cosmetics regulations, the vast majority of assessors will want the exact formula
the finished safety report is held by the Responsible Person and is not uploaded onto the Portal; the only third party who’d need to see it would be a member state’s competent authorities (e.g. the Trading Standards Institute in the UK), who’d need to see the report if they were addressing specific safety or regulatory concerns that had been raised about the product