on fedora 37 the postinstall script try to create these links:

# Link to the binary
ln -sf '/opt/balena-etcher-electron/balena-etcher-electron' '/usr/bin/balena-etcher-electron'

# SUID chrome-sandbox for Electron 5+
chmod 4755 '/opt/balena-etcher-electron/chrome-sandbox' || true

while it's installed into /opt/balenaEtcher/.
and anyway both can be solved much clean way:

1. create symlink during build not during install. in the way the file /usr/bin/balena-etcher-electron will be part of the rpm package and the uggly postinstall hack also do not required.
2. the chmod can also be added to the spec file with the %attr 4755 ...prefix before the filename