I tried:

package main

import (
	"bufio"
	"image"
	"image/png"
	"os"

	"github.com/go-text/render"
	"github.com/go-text/typesetting/font"
)

func main() {
	f, err := os.Open("NotoColorEmoji-Regular.ttf")
	if err != nil {
		panic(err)
	}
	defer f.Close()

	face, err := font.ParseTTF(f)
	if err != nil {
		panic(err)
	}

	r := render.Renderer{
		FontSize: 24,
		PixScale: 1,
	}
	img := image.NewRGBA(image.Rect(0, 0, 200, 200))
	r.DrawString("🍣", img, face)

	out, err := os.Create("emoji.png")
	if err != nil {
		panic(err)
	}
	defer out.Close()

	w := bufio.NewWriter(out)
	if err := png.Encode(w, img); err != nil {
		panic(err)
	}
	if err := w.Flush(); err != nil {
		panic(err)
	}
}

with NotoColorEmoji-Regular.ttf, but nothing is rendered. I'll investigate more later.

EDIT: I modified render like this:

diff --git a/svg.go b/svg.go
index 84c18a5..0b82183 100644
--- a/svg.go
+++ b/svg.go
@@ -2,6 +2,7 @@ package render
 
 import (
        "bytes"
+       "fmt"
        "image"
        "image/draw"
        "io"
@@ -33,6 +34,7 @@ func renderSVGStream(stream io.Reader, width, height int) (*image.NRGBA, error)
        if err != nil {
                return nil, err
        }
+       fmt.Println(icon.ViewBox)
 
        iconAspect := float32(icon.ViewBox.W / icon.ViewBox.H)
        viewAspect := float32(width) / float32(height)

and the output was

{0 0 0 0}

Noto Color Emoij is not rendered #191

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