Should I post my side projects or proof of work on LinkedIn?

Only if they genuinely signal the skills the hiring manager is looking for in a specific role. Ask yourself: does this demonstrate the three or four things a hiring manager at my target companies is actually evaluating? If yes, post it. If it signals something orthogonal to your target roles, it may not help and could create confusion. Also: ideas don't matter, only execution does. Share your work openly without worrying about someone stealing your idea — that fear is almost always misplaced. The more important question is whether the work is actually solving a real problem for a real user. A project that has even one genuine user is worth far more as a signal than something theoretical. If you're doing side projects to demonstrate AI product management capability, make sure the execution is high enough quality that it actually proves the thing you want it to prove.