That all depends. You don't want to mindlessly make backlinks if you don't know what the issue is.
How old is the page/post that you are trying to rank?
Have you done any on-page SEO optimizations? (using LSIs, Good Content)
Is it covering the top subjects or similar top subjects of the higher-ranked pages in Google for that keyword?
What kind of backlinks are you pointing to it? You need good niche-related backlinks.
There are a lot of things that can factor in how your page/post is ranking. That's why it's important to make sure you do the 3 things I mentioned above if you haven't.
Many people say their posts are optimized properly, but most of the time, I highly doubt it.
I know for a fact when something I make doesn't rank, it's because my on-page SEO and readability are poor, and I need to re-look into