Consensus on the name of the domain was reached with the VRT leaders (formerly known as OTRS admins). vtrs-wiki was considered but as the wiki is the home to the community and not just information about the system and software, VRT properly represents the purpose. We also decided against using "internal" in the URL.
We'd like to see if this task can be completed by the end of May 2021, but it's understandable if it takes longer. New icons are coming, probably the week of 3 May.