Fragrance
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The definition
"Any intentionally added substance or complex mixture of aroma chemicals, natural essential oils, and other functional ingredient or ingredients for which the sole purpose is to impart an odor or scent, or to counteract an odor."
Counteracting an odor is included
A masking agent added to cover the smell of a surfactant is a fragrance ingredient by this definition even though nobody would call the product scented. That catches a lot of otherwise unscented formulations.
The label can still use a generic term
Under the second label option, generic terms such as "fragrances" are permitted on the package, which is the shelter a perfumer expects.
The website is where it gets specific
Both label options carry fragrance allergen requirements, and the website disclosure is the fuller list. A proprietary scent blend is less protected here than it is under cosmetic labeling, and that is the deliberate point of the statute.
Which matters if you buy your fragrance in
A fragrance house supplying a blend may treat its composition as confidential. If you cannot get what you need to disclose, you cannot comply, and the time to establish that is when choosing the supplier.
Ask for a disclosure pack, not a data sheet
A safety data sheet is written for a different purpose and will not generally give you an allergen list with CAS numbers. Ask specifically for what the cleaning product disclosure regimes require, and ask before you commit to the scent.
Unscented is a real option
It removes a supplier dependency, an allergen question and a column of the disclosure, and a meaningful part of the laundry market is actively looking for it. For a small range that is a simplification worth pricing.