Sorry no experience with cpanel and how they set up the environment and how Node.js runs in it.
The first line however:
/home/.../nodevenv/.../.../lib/bin/n8n -> /home/.../nodevenv/.../.../lib/lib/node_modules/n8n/bin/n8n
npm WARN lifecycle The node binary used for scripts is /home/.../nodevenv/.../.../bin/node but npm is using /opt/alt/alt-nodejs10/root/usr/bin/node itself. Use the `--scripts-prepend-node-path` option to include the path for the node binary npm was executed with.
Sounds like there is probably something wrong.
So maybe something like that: