If the content-type of the response is application/ld+json, it can't highlight the data in Pretty mode.
Here is the response headers:
server nginx/1.23.4
content-type application/ld+json; charset=utf-8
transfer-encoding chunked
connection keep-alive
vary Accept
x-content-type-options nosniff
x-frame-options deny
cache-control no-cache, private
date Thu, 29 Aug 2024 06:16:14 GMT
link <http://localhost:8887/api/docs.jsonld>; rel="http://www.w3.org/ns/hydra/core#apiDocumentation"
etag "b0c5fe840962460dae8db776ca286a62"
x-debug-token 8f860b
x-debug-token-link http://localhost:8887/_profiler/8f860b
x-robots-tag noindex
References: