What about if a business owner sells lifestyle products such as: a water bottle , a blow dryer , a facial scrub , a handbag etc
Is it permissible using a commission based system to use high following social media influencers to promote these products? This may be with the use of demonstration of how to use the product or doing vlogs talking about the product. In Islam are there any restrictions to this? Influencers include non-muslims and muslim females. Does the influencer have to be wearing hijab?

If the market you are targeting is a Muslim target then yes they need to be in hijab if you’d target is non Muslim it’s not a requirement. Using influencers to promote business within the ethics of Islamic law is accepted