Need suggestions for promoting dry type transformer manufacturers through SEO

I have been working on an SEO project for a client in the dry type transformer manufacturers industry and I am noticing that the niche is very competitive with limited high quality content online. Since this forum is full of digital marketers and SEO people, I wanted to ask what strategies you would recommend for improving organic visibility for such technical products. I am focusing on keyword clusters, competitor analysis and topic authority but I feel like there is room to optimize better.

If anyone here has worked with industrial or B2B technical clients, I would love to know what type of content usually performs well and how you build backlinks for something so specific. Any practical tips or real examples would really help me push this project in the right direction.