The RPM package for Linux x86 64 bit has its architecture set to amd64, but the correct value should be x86_64. This problem prevents installing the RPM on current versions of Fedora.
Attempting to install results in an error "package nrf-command-line-tools-10.15.4-1.amd64 does not have a compatible architecture"
% rpm -qip nrf-command-line-tools-10.15.4-1.amd64.rpm
Name : nrf-command-line-tools
Version : 10.15.4
Release : 1
Architecture: amd64
Install Date: (not installed)
Group : unknown
Size : 82042919
License : unknown
Signature : (none)
Source RPM : nrf-command-line-tools-10.15.4-1.src.rpm
Build Date : Mon 28 Feb 2022 04:49:54 PM CET
Build Host : sag-tool-docker-ubuntu-x64
Relocations : /opt/nrf-command-line-tools
Vendor : Nordic Semiconductor
URL : www.nordicsemi.com/.../nRF-Command-Line-Tools
Summary : nrf-command-line-tools
Description :
A command line tool set for programming nRF series devices via J-Link debug probes.