Thanks all that’s been really helpful information.

To cover-off/what my experience has been so far. The name not matching error I saw when first checking for point upgrade eligibility on the booking was due to my partners ticket under the same booking reference, I had not yet added their name as a Redemption Nominee on my account (as we’ll use my points), once I sorted that all was happy in the online system as both names, not just mine, matched.

Unfortunately for us the segment I was hoping to upgrade on has no reward seats available, however I spoke with LiveChat and they’ve waitlisted us.
This is without me having enough points in my account as I’m yet to transfer any points to my Krisflyer account. My understanding is that if we are accepted then I’ll have a day/few days to transfer points to my account and accept the upgrade at that point, fingers crossed!