You can find posts on the topics you care about in two ways, depending on whether you want to watch the whole of LinkedIn or only the prospects you already follow.
Two ways to find topic posts
Topic campaign (whole network): Create a campaign and choose Track topics to monitor your topics across the whole of LinkedIn, from anyone posting about them, not just your prospects. Best for discovery and visibility: joining relevant discussions and getting found by people interested in your area.
Filter by your custom topics (your prospects only): Already running a prospect campaign? Open its Commenting tab, or click Filters at the top of its post feed, and under Filter by your custom topics choose Only my custom topics. This narrows that campaign's feed to posts matching your topics. Best for cutting noise when the people you follow post about many different things. This is a plan feature.
Where your topics live
Define your topics once in Settings → Topics to monitor, then reuse the same topics across any campaign. For step-by-step setup of either option, plus tips on writing good topics and tuning your feed, see Topics campaigns and AI topic filtering.