Yes, the module can be installed from within Magisk Manager, but the stock Xposed installer, needed for downloading and enabling Xposed modules, doesn't recognize the Xposed Magisk module. In this case, you need to download a modified Xposed installer from this thread:To get xposed, simply download it from magisk manager. Thats it.
https://forum.xda-developers.com/xposed/unofficial-systemless-xposed-t3388268