What are you trying todo?

I want to use the exif metadata API in order to create and read out additional metadata from a TIFF file.

What are the steps to reproduce?

await sharp({ create: { width: 1000, height: 48, channels: 3, background: '#fff' } })
        .withMetadata({ exif: { IFD0: { Copyright: 'Some Name' } } })
        .toFile('sweep.tiff')

const tiff = await sharp('sweep.tiff').metadata()
console.log(tiff.exif) // logs undefined

What is the expected behaviour?

Should log { IFD0: { Copyright: 'Some Name' } } (or a Buffer)

What is the output of running npx envinfo --binaries --system?

 System:
    OS: macOS 12.1
    CPU: (8) x64 Intel(R) Core(TM) i5-1038NG7 CPU @ 2.00GHz
    Memory: 20.61 MB / 16.00 GB
    Shell: 5.8 - /bin/zsh
  Binaries:
    Node: 16.13.0 - ~/.nvm/versions/node/v16.13.0/bin/node
    Yarn: 1.22.5 - /usr/local/bin/yarn
    npm: 8.4.0 - ~/.nvm/versions/node/v16.13.0/bin/npm