dnf install mssql-tools does not create symlinks
dnf install mssql-server & dnf install mssql-tools do not create symlinks to /opt/mssql and /opt/mssql-tools18/bin/
to run mssql commands you need to create your own symlink to /*/bin, add /opt/mssql-tools18/bin/ to your PATH or type in the full paths
mssql-conf
sqlcmd
please upvote bug here