You can check with:
/usr/bin/kvm --version
Should show the following:
QEMU emulator version 5.2.0 (pve-qemu-kvm_5.2.0)
Copyright (c) 2003-2020 Fabrice Bellard and the QEMU Project developers
Also:
# dpkg -l pve-qemu-kvm
Desired=Unknown/Install/Remove/Purge/Hold
|...
