https://support.hpe.com/connect/s/softwaredetails?language=en_US&softwareId=MTX_f04fd4882938473196bcb4b425&tab=Installation+Instructions
System ROM Flash Binary - HPE ProLiant DL380 Gen9/DL360 Gen9 (P89)
Type:	BIOS - System ROM
Version:	3.08_01-12-2023(14 Feb 2023)
Upgrade Requirement:	Recommended
Operating System(s):	OS Independent
Description
This release provides the system ROM flash binary which can be used to update the system ROM version from the UEFI Shell or the System Utilities pre-boot environment.
Installation Instructions

To ensure the integrity of your download, HPE recommends verifying your results with the following SHA-256 Checksum values:
a8e10bf1abacd4bbe63d2665899b2abe60cde5914d900daf54ca9b9b1be8d817 	P89_3.08_01_12_2023
a1b196853a58500329184daf4fab14456d1a0c21143ed38d4e97c55bf0402aa1 	P89_3.08_01_12_2023.signed.flash

https://srvdl.afrasrv.com/Firmware/G9/D360-DL380-G9-Firmware-P89_3.08_01_12_2023.signed.zip