Does Anyone Know Where's the Problem of My SEO? Help

So I was assigned to operate our website and it's been two months since i start to do seo. But the number of keywords grows very slow.

You guys can see the SEMrush screenshot of my website below.










However, when I look at my competitors. They can do 6000 keywords at one Month. Check Below.







Please help me figure out how they did that can make this huge keywords base. Is it because they buy backlinks? If so, what kind of backlinks shld I buy, do you have some recommendation on the numbers of every kinds of backlinks and the service vendor on BHW marketplace?

Thank you so much!!!

You can run a content gap analysis on your competitors, any keywords you are missing build content around.

More content = more keywords.

You'll need to build backlinks anyway, need to keep the domain power growing.

Domain authority is huge right now. PA fails.

it's usually a result of the number of content pages that are indexed, multiplied by the number of terms that google considers keywords and which rank.

In other words, the more content from your site that google indexes, and the more unique LSI terms / SEO entities / keywords / whatever you want to call them you have in your content the more keywords Semrush will detect.

Which basically means: publish more content = rank for more keywords

Traffic isn't proportionate to number of KWs
You need to target kws with more search volume