Backlinks

I have a queston : if my wp site it is: https://www.mex-container.ro

If i can make backlinks for that also include a good google authority for , example: https://www.mex-container.ro/containere-preturi ???

Or for the second url i need to make separate backlinks to ,,upgrade” in google ranking?

*If i want to get people only for url,and promote: https://www.mex-container.ro ,
recomands someone to make that a static page ?( i mean from the corner or the SEO – indexing -good ranking position ) or i can make a good rank/seo for the Uncatorized post that i have on https://www.mex-container.ro