This task can be performed using LinkedIn Semantic Post Search
The LinkedIn search engine stinks, so we built one that works.
Best product for this task

LinkedIn Semantic Post Search
marketing
Usage is simple: -You input text describing the topic you want to learn about. -You get a list of posts on that topic. We also gather meta-data on each post, like the author, level of engagement on the post, and the commenters. This bot can be used to build a list of contacts posting on a topic, which can be a valuable intent signal. We’ve used this bot to connect with influencers posting on topics related to Surudo’s business. For example, here's a great way to build an account list if you’re selling a CRM to wealth management firms: search for wealth management companies that have posted about issues with current CRMs.

What to expect from an ideal product
- Search for posts in your market by typing keywords or topic descriptions
- Find posts with high engagement to spot influential voices in your field
- Check who's commenting on relevant posts to expand your network
- Build lists of people actively discussing your industry's pain points
- Track who's sharing experiences with competing products in your market space