How to find : Signal and Intent ?

So I am building GTM Pipeline from last 4-5 months and worked on different parts of it and finding difficulties in signal and intent identification.

My work involve different different module :

• Scenario and ICP definer Agent.
• Lead Enricher Agent (built 20+ data segment categories to gather different kind of data)
• Signal and Intent finder ( currently working )
• Lead Scorer Agent
• Email and LinkedIn automation

Now for signal and intent i did basic things like :

• Hiring Signals (If hiring post, JD involve what product/service we want to sell).
• Any recent LinkedIn post of decision maker regarding that product and service.
• Review and Sentiment Signal ( recent bad review of product : on lead website, g2, trust-pilot etc).
• Any recent news signal. (In few case new rules regulations : Tariff in the case of import export).

What else I can do ??

How usually it happened when you do it manually, what kind of things you search for.
I know this question is vague because signal vary industry to industry but give me general idea or may be your domain specific Idea which I can research upon and build my system, because this is the only bottleneck I am facing everything else I have build already.