It's not our fault USCIS is blacked up and cannot process the EAD in timely manner ie with in 90 days that's is standard time frame but we will suffer this time if they didn't approve the EAD or didn't publish the auto extended FRN before June 30, 2024.
There are few options for Employer, legally they can terminate you because of the lack of document to prove you can legally work in United States or they can put you in Unpaid LOA for few weeks to month, that's your employer decision.