Search the forum (for “dsm 7” can be a good start).
Roon Server on Synology DSM 7.0 Preview - Roon Software / QNAP/Synology NAS - Roon Labs Community
Synology DSM 7 and third party apps - Roon Software / QNAP/Synology NAS - Roon Labs Community
Roon Server on Synology DSM 7 Situation - Roon Software / QNAP/Synology NAS - Roon Labs Community