Custom headers with Netlify

[frontendbeast]

If I do a curl on my HTTP Netlify url I get the custom headers on the 301 redirect but not then 200 response it goes to, and if I load the HTTPS directly I don't get the custom headers at all.

Am I right in thinking that adapter-netlify doesn't currently handle any custom headers set via a _headers file, and any headers set in netlify.toml wouldn't work either?

[swgn]

I have some custom headers working just fine on my netlify site. I'm setting via the following lines at the end of my netlify.toml file (I'm not using a stand-alone _headers file to add these):

[[headers]]
  for = "/*"
  [headers.values]
  Strict-Transport-Security = "max-age=63072000; includeSubDomains; preload"
  X-Frame-Options = "DENY"
  X-XSS-Protection = "1; mode=block"
  X-Content-Type-Options = "nosniff"
  Referrer-Policy = "strict-origin-when-cross-origin"
  Permissions-Policy = "camera=(), geolocation=(), microphone=()"