It clearly states the negotiation is for withdrawal. Withdrawal has nothing to do with future trading arrangements. The uk government insists it does not want a future framework in place but wants to be a third party nation. That being the case there is no future framework to take account of particularly. The UK will have the same status in the EU as Uganda.
It is the UK that has refused to discuss a future framework as they will not accept the rights and freedoms that this would entail extending to EU citizens
So withdrawal has nothing to do with future [trading arrangements] but does have something to do with future [framework]?
(Obviously, the withdrawal process encompasses both.)