H4 EAD Processing after H4 Approval | Different Centers

My wife’s H4 Visa approved in December 2020. H4 EAD still pending.

Her RD for H4 is June 2020 at Nebraska. Her RD for H4 Ead is 10 days after H4 at Vermont.

Since H4 is already approved, can we expect a decision on EAD within 90 days of approval. It’s already 2 months, but no updates on EAD so far.