here's some refs I took, you might find them useful https://imgur.com/user/ZetherosScholagladiatoria is also a good resource for medieval weaponry https://www.youtube.com/@scholagladiatoria/videos
The earrings seem out of place to me, I think they feel too modern. I would expect a knight to either not have earrings at all, or something a little more ornate and compact.
Surface metal decorations should appear as embossed through repousse & chasing. The filigree looks like it's welded on here. The boobs have an odd shape to them.
Would be cool to see a helmet design.
Overall, professional render and interesting design, awesome work. I particularly like the stitching work on the cuirass with the fire/feathered details. However I would recommend more references - museum references, when working with plate armour.
I think the hair looks a bit dull, could use a some more fire/variation.
Scholagladiatoria is also a good resource for medieval weaponry https://www.youtube.com/@scholagladiatoria/videos