H1B COS & H4 COS are approved, what would be my valid status

I would really appreciate inputs on my current situation summarized below.

H4 COS application got approved couple of days after H1-B COS approval. I am already working with attorneys on next steps but posting here to understand the experiences of folks who faced similar situation and what steps were taken to retain the H1-B work authorization. I would really appreciate sharing the experiences.

Timelines:

  1. Jan 26: Last day with old employer (lay-off)

  2. Feb 4: H4 COS and H4 EAD filed, no premium processing. Status updated to Received by USCIS

  3. Apr 16: New Employer filed H1-B COS in premium processing

  4. Apr 24: RFE on maintaining of status

  5. May 8: RFE responded

  6. May 11: H1-B application status changed to clock stopped

  7. May 22 Morning: H4 EAD status changed to new card being produced

  8. May 22 Evening: H1-B application approved

  9. May 22 Evening: H4 application is still showing Case received status

  10. May 26 Morning: H4 application approved.

My queries:

  1. If H4 and H1B have the same start/effective date, what would be my status?
  2. If H4 effective date is newer than H1B, what are my options to retain H1b approval? My previous visa stamp is expired so travel for stamping is not an option I am considering.