There are ways to do chroot installs on RHEL but sadly not well documented.
Some resources on this:
- https://glacion.com/2019/06/16/Fedora.html
- https://github.com/glacion/fedora-chroot-installation
- https://web.archive.org/web/20150912004438/https://wiki.cent...
Most of that will work for RHEL with some minor modifications.
Pity it is not better documented.