You are adding an incorrect repository for RHEL. RHEL is based on RPM packages, but you are adding a repository with DEB packages for Debian/Ubuntu.
Add repository in file: `/etc/yum.repos.d/tor.repo`
[tor]
name=Tor for Enterprise Linux $releasever - $basearch
baseurl=
enabled=1
gpgcheck=1
gpgkey=
cost=100
Enable EPEL repository:
dnf install epel-release -y
Import GPG key for repository: <
wget -O- -q
rpm --import public_gpg.key
Install Tor:
dnf install tor -y