The title pretty much says it all. This is in reference to this "Submit a request" form. The following form appears when you select "Configured Commerce (B2B" for the Product drop down. (Pictured
Lately I've had a number of support request for which these options don't apply. We have a number of customers with sandbox2 environments that are being used either as an alternate development pipeline or as a UAT/QUA environment. We've also used "-preview" to denote pre-prod environments during transitions to the v3 architecture. Alternatively, we could also add an "other" option with a subsequent text field.
Thanks for considering!
Dominic