According to the vendor, no, there is no card included.
Most Synology NAS devices do not have WiFi functionality.
With NAS until DSM version 6.1, you could still use a WLAN dongle that you connected to the NAS via USB.
However, as of version 6.2, these are no longer supported.
- The operating system of the DS720 + is DSM 7.0.1
- The DS720 + no longer supports WLAN dongles
A possible solution could be:
https://kb.synology.com/de-de....
It explains how to connect a NAS to a router and use the router to establish a wireless connection with the main router.