No. An offer date is not a government decision. Vetting, classification, admissibility, visa availability and the applicable immigration process control the outcome.
Keep the contractual deadline open to the real process
Record what the employer has promised without converting it into an official service guarantee. Follow instructions for the processing fee and, after successful vetting, the gift. Payment alone does not provide permission to begin U.S. work or guarantee a move date.
No fixed, guaranteed timeline is appropriate to rely on for a program that is still comparatively new and described as evolving; processing depends on the underlying employment-based category used and the program's own registration and review steps at the time of filing. Keep records of communications and dates for both, and avoid setting a moving date, resignation date or lease based on either process's promotional or general processing language. Identify what would need to change in the household's plans if additional information or a further step is required, and avoid finalizing housing, employment or school arrangements around an assumed approval date. A scheduled interview guarantees neither approval nor a moving date: assess housing, schooling, and business commitments through the decision and applicable admission steps.