Nearly all recruiters I've known in the tech sector (context: developers, project managers, consultants, business and technical analysts, mid level managers in bespoke development and inhouse verticals) used LinkedIn exclusively for talent scouting (I know Github is a thing but more in software product dev). If you are not on LinkedIn, you are simply not on the radar. So you would not be in their CRM without a LinkedIn profile to begin with. You could try contacting them directly, but the LinkedIn banned me and I do not know why talk would be akward at best.