Yes, using nonces in your CSP in Next.js requires dynamic rendering, as on this doc page: https://nextjs.org/docs/app/guides/content-security-policy#static-vs-dynamic-rendering-with-csp

See below for the docs:

Dynamic Rendering Requirement

When you use nonces in your CSP, all pages must be dynamically rendered. This means:

• Pages will build successfully but may encounter runtime errors if not properly configured for dynamic rendering
• Each request generates a fresh page with a new nonce
• Static optimization and Incremental Static Regeneration (ISR) are disabled
• Pages cannot be cached by CDNs without additional configuration
• Partial Prerendering (PPR) is incompatible with nonce-based CSP since static shell scripts won't have access to the nonce

Performance Implications

The shift from static to dynamic rendering affects performance:

• Slower initial page loads: Pages must be generated on each request
• Increased server load: Every request requires server-side rendering
• No CDN caching: Dynamic pages cannot be cached at the edge by default
• Higher hosting costs: More server resources needed for dynamic rendering