Question on MSG3 Timing and Delta Usage in 5G NR

Hi Experts ,

I have a query regarding the MSG3 transmission in 5G NR, specifically about the usage of MSG3Δ\DeltaΔ in TDD configurations:

  1. In the initial transmission of MSG3, I understand that MSG3Δ\DeltaΔ is used along with k2​ for uplink slot alignment. Is this understanding correct? also what significance does MSG3Δ\DeltaΔ play in MSG3 Transmission
  2. For MSG3 retransmissions, is MSG3Δ\DeltaΔ applied again, or does the scheduling of retransmissions by the gNB (via UL grants in DCI) override the need for DeltaΔ?

Thanks in advance for your help!