From EPPlus version 5.6 you can create your own custom pivot table styles. Custom named styles are created via the ExcelPackage.Workbook.Styles property. Custom styles can either be created from ...
$$\color{#ff4545}\textsf{\Large{ⓘ}\kern{0.2cm}\normalsize Below only available from Epplus 7.0 onwards}$$ As of Epplus 7.0 you can create CustomIconSets with EPPlus To do so, try e.g.
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