PerplexityBot is being blocked.
US companies running enterprise-grade web application firewalls, CDN bot protection (Cloudflare, Akamai, Fastly), or aggressive security configurations frequently block PerplexityBot without realising it. The bot's user-agent is not whitelisted, or a blanket bot-blocking rule is preventing access. Your content — however strong — is invisible to Perplexity's indexing system. It cannot cite what it cannot read, and right now, it probably cannot read your most important pages.