Documentation provides information only how to deploy RHAMT to OCP 3.11 [1] in Openshfift Web UI but does not provide instructions for OCP 4.x where Web UI is different.

Also instructions how to deploy RHAMT using oc command should be provided. Those steps should look like (they're the same for OCP 3.11 and OCP 4.x):

oc login ...
oc new-project rhamt #create rhamt project
oc replace --force -f rhamt-web-distribution-4.3.1.Final/openshift/templates/web-template-empty-dir-executor.json # deploy template
oc new-app --template=rhamt-web-console # deploy RHAMTapplication

[1] https://access.redhat.com/documentation/en-us/red_hat_application_migration_toolkit/4.3/html-single/web_console_guide/index#openshift_install