I've a pct using script for Debian 10.6 that attempts mount a host directory in the container:
pct create 901 local:vztmpl/debian-10-standard_10.5-1_amd64.tar.gz --cores 2 --net0 name=eth0,bridge=vmbr0,ip=dhcp --rootfs local-lvm:8 --features nesting=1 --$
echo Doing dav mountpoint ...
mkdir...