GraphicsMagick can't use drawText with ImageMagik in AWS Lambda Later

Question

Following the layer creation steps here: https://www.youtube.com/watch?v=JdJo-_Y1ZIM that specifically install the layer: https://serverlessrepo.aws.amazon.com/applications/us-east-1/145266761615/image-magick-lambda-layer

The code works -- I'm able to resize images just fine. Note:

const GM = require('gm');
const gm = GM.subClass({ imageMagick: true });

exports.resize = async (buf, width, height) => {  // WORKS!!
  return new Promise((resolve, reject) => {
    gm(buf).resize(width, height).noProfile().toBuffer((err, buffer) => err ? reject(err) : resolve(buffer));
  });
};

exports.osdStamp = async (buf, message, gravity) => {  // DOES NOT WORK
    return new Promise((resolve, reject) => {
      gm(buf)
      .fontSize(40)
      .drawText(10,50, message)
      .toBuffer((err, buffer) => err ? reject(err) : resolve(buffer));
    });
  };

The output buffer is created (and subsequently saved to S3 successfully) but it does not have any text on it.

I have also tried the suggestion in this question Draw text on image using graphicsmagick (node-gm) drawText
gm(buf).fill('#ffffff').font('Arial', 27).drawText(225, 75, "Some text"); This did not put text on the image.

I can't help but wonder if it's related to not having fonts as the question-asker guessed in this question: How to use ImageMagick `drawtext` method in AWS Lambda function?

So I have tried downloading a ttf font, including it in my package, and referencing it:

gm(buf)
      .fill('#ffffff')
      .font('./Hack-Regular.ttf', 27)
      .drawText(10,50, message)
      .toBuffer((err, buffer) => err ? reject(err) : resolve(buffer));
    });

I also tried an absolute path.

  gm(buf)
  .fill('#ffffff')
  .font('/var/task/fonts/Hack-Regular.ttf')
  .drawText(10,50, "SOME TEXT!!!SOME TEXT!!!SOME TEXT!!!SOME TEXT!!!SOME TEXT!!!")
  .toBuffer((err, buffer) => err ? reject(err) : resolve(buffer));

Further, I have verified the font file is there with:

var cp = require('child_process');
var ls = cp.spawnSync('ls', ['/var/task/fonts'], { encoding: 'utf8' });
console.log('stdout here: ' + ls.stdout);

And getting the output: 'Hack-Regular.ttf'

Note, I'm not getting any errors. I'm simply not seeing any text on the image.