You need an S-NET dongle to update the FW:
and SNET PRO software: SNET Pro 2 Service Software | Downloads | Samsung HVAC
You can see what firmware versions are available via the Samsung Partner Portal: https://partnerhub.samsung.com/s/?language=en_GB
My FW updated is detailed in this post below, YMMV. I have a Gen6, so FW could be totally different for Gen7, check the hardware versions carefully before updating!
No, apparently the UK Samsung technical don’t get to see any FW change logs themselves