You can use n
to manage your node installs and to do the installation in the correct directory.
Node 14 example:
apt-get install npm npm install -g n export N_PREFIX=/opt/plesk/node/14 && n 14 plesk sbin nodemng register /opt/plesk/node/14/bin/node
Then go to you Node.js manager in Plesk and refresh the list of available node versions.