From a legal perspective, as long as you have your own company and your products pass relevant national certifications and obtain corresponding qualifications, and register your own trademark, you can sell it yourself. This is what is called OME, OEM. However, this is controlled by people, the cost is slightly higher, and there is no advantage.

As long as you have your own company trademark, certification and qualifications, you can sell it no matter who you buy it from. Of course, you are fully responsible for your own brand products!