Hi,
I can create svg shape to Symbol Palette,but when I dragging to the SfDiagramComponent,the svg image is hiden.I have try the path shape is OK.And It's OK too when I create svg node to the SfDiagramComponent directly.
The following link is sample demo gif,the first icon is
path shape,the second and the third icon is svg shape.
https://i.postimg.cc/xCcXy36j/2023-03-12-22-34-14.gif
The sample project in attachment.
Attachment: SVGShape_1216c3c6.zip