Add Custom Marker Symbols for Scatter Trace

Hi all, really liking this framework so far. One feature that would be great to have would be the ability to add custom marker symbols to the scatter trace. It looks like I'm not the first person to be in need of this: https://community.plotly.com/t/i-want-to-use-custom-icon-for-the-scatter-markers-how-to-do-it/6644

I'm currently trying to overlay 2 of the existing symbols on top of one another to get a square with the 'Y' symbol inside. I can achieve this within the plot window easily enough by using two separate scatter traces, one with each symbol. Unfortunately there doesn't seem to be a way to make this look right in the legend. If I could instead use a single trace that would solve the legend issue, either by stacking shapes or more generally accessing the SVG syntax that's already used behind the scenes to render these symbols.

Any thoughts on whether this is feasible?

No file or test is named. Start by tracing how scatter marker symbols and legend entries are represented, focusing on whether the existing SVG-based symbols can support a composed or custom symbol in one trace. Done means a custom marker renders correctly and the corresponding single-trace legend entry matches it.