No. A seven-year total is not automatic from a new title. USCIS applies specific rules, including at least six months in managerial or executive employment for the relevant expanded maximum-stay eligibility.
Review the clock before the change
The managerial role must qualify and the change must receive the proper petition treatment. Prior H and L periods can affect the available time. Gather exact dates and approval records before choosing an extension strategy or travel date.
Counsel should assess these rules early; a late promotion or expedited adjudication cannot be assumed to create the required employment history. The failure here is arithmetic done backwards, starting from a desired total and working toward it. Prior H and L periods can affect the time available, and a promotion late in an L-1B stay may not deliver the expected result, because the relevant expanded maximum-stay eligibility depends on qualifying managerial or executive employment, including at least six months of it, and on USCIS having approved the change in a new, amended or extended petition when the change occurred.
The earliest signal is a plan expressed as a number of years rather than as a set of dates. Gather exact admission and approval dates before choosing an extension strategy or booking travel, and have counsel assess the rules while the promotion is still being scheduled. Expedited adjudication cannot create employment history that has not occurred.