Asking for my sister again

My sister has got a talent accredited work visa for which the first entry date is on or before May 3 and her travel plans were cancelled due to border closure by march 23. Currently she is overseas and her employer has informed they are withdrawing the job offer as the opening of borders is unknown for next 6 months. 1)Will she be able to get an extension of first entry date if the employer holds the offer n reissue a new offer later? (which they have proposed to do). 2) can her husband enter NZ as he has an open partner work visa even if she is unable to secure this offer? 3) Is there a possibility if she can search another job offer and can get a variation of conditions on this visa being offshore?

Anyone in the same situation had any luck contacting INZ? We've emailed INZ requesting first entry date waiver but haven't had a response yet.