I think you will find different approaches and models regarding dropshipping.
Many years ago I looked into dropshipping, to be hit with awful margins as the reality, mainly when a company offers you a website, etc. I see this version more as affiliate marketing in many ways, except the orders come to yourself through the provided website.
I eventually settled on my own version, I would approach companies who did not sell via the web, remember those days? I got agreement to have goods delivered direct, I made the website, decided on prices etc. Doing things that way, I made a good living for a few years until I ended up doing other things. I used to make 100/300% markup, but was very competitive at the same time, mainly large heavy items such as wardrobes, beds etc.