Hi, I have checked your requirement, and yes, I can help you out with the backlinks creation for the various niches.
We use the Ahref and various other tools to check the DA PA, Competitor backlinks, and based on it, and I will be suggesting the links since I had worked on a similar project before, where we will be doing free as well as paid submissions, Guest posting, etc.
I would like to know more about your project. Kindly initiate a chat so we can discuss this in detail.
Regards.