Inconsitencies with `hvplot.extension(compatibility)`

Extracting the comments from: https://github.com/holoviz/hvplot/pull/1380#issue-2430199101 (relates to `MATPLOTLIB_TRANSFORMS` and `hvplot.extension(compatibility)`)

> I have encountered a few other issues that could be addressed here:
> - Missing `markers` compatibility. Reference [1] [2]
> - (marker) `size` is inconsistent, I am multiplying by `20` and seems alright?
> - Edges are not color linked by default. Don't know how to address this
>
> [1]: https://docs.bokeh.org/en/latest/docs/reference/models/glyphs/scatter.html#bokeh.models.Scatter
> [2]: https://matplotlib.org/stable/gallery/lines_bars_and_markers/marker_reference.html#marker-reference