Yes, a bib tap can be used on a basin sink, but only if the fitting and usage match.
A bib tap is usually designed for outdoor taps, utility areas, or washing machines, and it often has a longer spout and a more robust body than a standard basin tap. If the sink basin has the correct hole size, mounting style, and plumbing connections, a bib tap can be installed and will work normally.
However, there are a few things to consider. First, a bib tap may look bulky or be too tall for a bathroom basin, making it awkward or causing splashing. Second, the outlet shape and flow may not be ideal for handwashing compared to a basin-specific tap. Third, some bib taps are intended for cold water only, so you should check whether your basin needs hot and cold supply. Finally, the thread size and pipe connections must match the basin setup.
So, while it is possible, it is usually better to use a tap specifically designed for basins unless you have a special requirement or a compatible installation. If you want, I can also tell you whether a bib tap is suitable for your specific sink type.