You are seriously time consuming 
One renderer properly says it support DSD
2025-09-07 02:29:39.989 Verbose UPnPRenderer Supported media type: http-get:*:audio/dsd:*
2025-09-07 02:29:39.990 Verbose UPnPRenderer Supported media type: http-get:*:audio/x-dsd:*
The other dont.