I tested this, it's much improved. But an issue mentioned in #98211 remains: there's a slight vertical shift when there are only emojis compared to when there are emojis mixed with text.

there's a slight vertical shift when there are only emojis compared to when there are emojis mixed with text.

This looks expected, different fonts have different height, and height of the label depends on its content (in this particular case, baseline of hex boxes might need adjustment as well, but it's not related to SVG).

Thanks!

This is excellent, but doesn't seem to have fixed #80766 using system emoji on MacOS.

system emoji on MacOS

macOS system emoji font is bitmap not SVG, so it is a separate issue.