Next.js Foundations Ch. 10: /dashboard static build output despite dynamic children?

[fuchinoko]

Following Next.js Foundations Ch. 10 (PPR), the course states dynamic functions make the entire route dynamic.

"And in Next.js, if you call a dynamic function in a route (like querying your database), the entire route becomes dynamic."

However, my /dashboard route, with children calling dynamic functions(like usePathname or fetching data), shows as static (○) in the build output (without PPR)

Q1: Is PPR already enabled by default in Next.js 15?
Q2: If not default, why is /dashboard static (o) despite dynamic children?
Q3: If not default, what's the difference when explicitly enabling experimental_ppr = true?
Q4: Could it be that the build output (○/ƒ) doesn't actually reflect real behavior?

[evanqhu]

same question