How much later?The 27-Jun and 18-Jul signing events are different.
27 June: International peace and investment accord (DRC–Rwanda–US)
18 July: Internal DRC decree on mining title reallocation (KoBold-focused)
Also regarding the finalisation of the Washington Accord ... including the three presidents, a formal date has not been set yet. Maybe it will be 27-Jul, but it could be sooner or could be later.
A week on Tuesday or 5 years?
Unknown unknowns.