Oracle client 12c , if i can't find uninstallation file, can i install 19c client on same server?

I have a server that has oracle 12 client installed but now have an application that references the same server that needs oracle client 19c installed in order to work with the service. I cannot seem to find the uninstall file on the server and wondering if i can install 19c in addition as only one workgroup has a 19c database and needs the 19c client