Is that possible to support legend's position control?

[Explorer-cc]

In the following links, the legend's position modified is not user-friendly:

• https://tex.stackexchange.com/questions/503651/pie-chart-with-joined-legend-position?noredirect=1&lq=1
• https://tex.stackexchange.com/questions/631263/pie-chart-with-legend-position-south?noredirect=1&lq=1

And I found that:

pgf-pie/tex/latex/pgf-pie/tikzlibrarypie.code.tex

Lines 487 to 499 in ede5cee

	\def\pgfpie@legend#1{%
	\coordinate[xshift=0.8cm,
	yshift={(\the\pgfpie@sliceLength*0.5+1)*0.5cm}] (pgfpie@legendpos) at
	(current bounding box.east);
	\scope[node distance=0.5cm]
	\foreach \pgfpie@p/\pgfpie@t [count=\pgfpie@i from 0] in {#1}
	{
	\pgfpie@findColor{\pgfpie@i}
	\node[draw, fill={\pgfpie@thecolor}, \pgfpie@style, below of={pgfpie@legendpos}, label={0:{\pgfpie@t\pgfpie@ifnumberinlegend{~\pgfpie@legendnumbertext{\pgfpie@p}}{}}}] (pgfpie@legendpos) {};
	}
	\endscope
	}

The anchor of legend is pinned down above.

Is that possible to support flexible legend's position control by just options?