I am using RHEL 8.4 and firewalld 0.8.2.

I want to upgrade to the latest version 1.0.1

 I downloaded the .tz file but don’t know what to do to install it to upgrade my RHEL 8.4 install of firewalld.

 Can anyone give me a list of commands to install Firewalld 1.0.1, please?

Why do you want to upgrade? The point of RHEL is to stick to stable older packages until you need a specific feature in the latest version. Have you asked your RHEL people? (If you're using CentOS, check the CentOS mailing list.)

On package-based Linux systems, always try to find a package for a system before trying to install from source. It makes it a lot easier to maintain your system, and someone else went through the pain of figuring out how to make the system work on your distro and version.

For RHEL, look for an RPM. Often one exists in the Fedora repo or the EPEL repo. I see that someone has built 1.0.1 for Federora's beta, called Rawhide. I don't know if the binary will work for RHEL 8. I usually repackage bleeding edge programs. I recommend learning how to build a source RPM (SRPM) and then downloading the Rawhide SRPM for firewalld-1.0.1.

https://src.fedoraproject.org/rpms/firewalld