One cannot deploy or update Splunk Universal Forwarders (UF) from a Deployment Server (DS). The DS can only send configuration files (apps) to existing UFs.
If your company has provisioning software like Ansible, Puppet, SCCM, etc., then you should use that to install UFs.
It's also possible to use a shell script to install forwarders remotely. A good one is at https://answers.splunk.com/answers/34896/simple-installation-script-for-universal-forwarder.html#ans....
yes of course, but Splunk doesn't give any installation feature or tool.
So, if you haven't a software distribution tool, you have to use a custom script that you can run from the Deployment server or from another server.
You can find infos in the following answer of mine: