Thanks for the information. I dug further on a centos forum and found the following response to a similar issue someone else reported:
**It's not "missing", it is just newer than the glibc packages that ship as part of CentOS 7 and that will never change. That version was decided when 7.0 was released and will not change for the entire 10 year lifecycle of CentOS 7. To change it would require every single thing that is part of CentOS 7 to be rebuilt and that is not going to happen.
The problem is not CentOS, it is that the application you are using is built using a newer glibc than ships with CentOS 7. We cannot control what a developer uses to build things but if they build against a newer glibc than we ship then it will not work. It's their problem to build against the right version not ours to supply the newer version that would break everything else.
The current (and last) version of CentOS 7 is 7.9.**
I'm currently running the 7.9 version. So it appears that the opera-stable-93.0.4585.21-0.x86_64 version is no longer supported for centos 7.x.