Major operating system updates are definitely something in which it's wise to proceed with caution – particularly when they involve major architectural changes like Windows 11. 

Virtual Drumline is simply a library that loads into Kontakt Player (by Native Instruments). So whether or not VDL will compatible with your operating system upgrade will depend on whether Kontakt is compatible since it is the actual program (or plugin) that runs on the OS.

Read Native Instruments' information on Windows 11 compatibility.

Also, read below for information from Avid (Sibelius), MakeMusic (Finale), and Steinberg (Dorico) about compatibility with Windows 11.