what mode did you want it to be? it only has one mode-IT mode, jbod is more of a subset with the card defaulting to virtual SES and depending whats connected to it sas, sata or nvme triggers those default modes-12g,6g, and 16gt/s respectively so to confirm look under enclosure in your above post
this card is an HBA cad-no raid (they removed the ability to aswitch between IT and IR mode) and defaults to allow passthru which tue nas takes over, easy peasy-the raid mechanism is frowned upon in the true nas community mostly for outdated propaganda and parroted from the highest mountain-"you will lose you data booting from raid0" "why do you need all that speed" "raid is slow to boot" blah blah blah-the only things of importance thaty can be changed is
Host Interface = PCIE
Device Interface = SAS-12G
Auto detect BackPlane = SGPIO/i2c SEP
but all look good except sas--12g but your drives are showing trhe proper 6g speed so changing it will not improve performance and with focus on the newer cards I wouldnt mess with it because good luck with support or fighting a signed bios that became corrupted-run storcli -help IT for HBA IT related commands and make a full flsh backup just in case-write down for sas number also-LSA is gui version but the not much to the 9500 HBA-their purpose is handling the lanes and the os or nas handling the rest-it does have tri mode nvme support seems like a waste for pcie 4 x8 bandwith for spinning disks of death but to each his own( I still have a dozen or so 4tb 3.5 sata 10,000rpm hitachi ultrastar refurb with warranty originally raid10
recently switch to linux software raid, btrfs file system and getting impressive consistant speeds after connecting nvme with cache software
$30 a piece with 1 failure worked out good-especially after getting a BRAND NEW replacement
Im actually trying to change my 9500 to IR mode by flashing it to its full raid identical twin the 9540-8i with no luck-they removed the ability to switch modes-I got mine for $500 ebay a year ago and like you I ran out and flashed it only to read the first print out that said it was in RAID mode!
its was already hacked and I messed it up following broadcom tech supprt-it took me 30 minutes to figure out c0 from cx as the moron emailed me saying use exactly what I send you-copy/paste fool-I guess we are both lucky the card pretty much sets itself up
regarding firmware-very buggy so if it works dont update anymore also mixed mode is the main firmware and uefi-psoc is some useless feature,arm is for arm cpu and x64bios is for computers running in bios mode so if modern computer uefi mode likely used so bios flash actually slows down boot time and it cant be easily removed afterword so future case in point if it revolves around bios updating: hold off on updating
probably too much info but now you know and on the plus side evrything looks good to me as what truenas will need so full speed city here you come!