Hello,
This is due to the fact that you're using a different variant.

RHEL7 (and CentOS7) have several variants, such as Server, Workstation, ComputeNode, etc. Those variants have different environments available during installation. The environment you're trying to install, "Development and Creative Work Station", is part of the Workstation variant. The issue is that for RHELSA 7.1, only a Server variant is available; this variant does not have that environment defined in its comps file.

You could check comps to see if there's another group or environment that at least partially fullfills your needs. To check the comps file, mount the installation media, then go to repodata/*-comps-Server.aarch64.xml in the mounted image, and browse the groups and environments defined within. Groups are defined in <group>, environments in <environment> and they contain <packagelist> and <grouplist> tags which describe their contents.

Also, some groups (and maybe even environments) defined in comps may not be available for selection during manual installation in the GUI. You can still install them if you use a Kickstart file; you can use it to define only packages, groups and environments and leave everything else for manual installation - in that case, the file will only contain the %packages section and nothing else. See the RHEL7 Installation Guide, particularly the Package Selection section, for information. (It will work for RHELSA 7.1 as well.)