The sweeteners listed for this bar are sucralose and steviol glycosides. Sucralose is an intense sweetener, and steviol glycosides are sweet compounds derived from stevia leaves. They are included so the bar can taste clearly sweet, like a chocolate-coconut dessert, without needing as much sugar as a conventional sweet bar.
The product description says they keep sugar lower than in classic sweet bars. That is not the same as saying the bar contains no sugar at all. The chocolate coating and other ingredients may still contribute sugar; the point is that the amount is reduced compared with typical chocolate confectionery, and the sweetness comes partly from these sweeteners.
For anyone tracking sugar, this distinction matters. The bar should be counted as a sweet snack, not as a sugar-free product. If you need exact values, the most reliable source is the full nutrition table on the package, not the presence or absence of sucralose or steviol glycosides on the ingredient list.
If you deliberately avoid sweeteners, this may not be the right product for you, because the sweet taste relies on them.