We do not. You can create heavy armor in grymforge, but it's not plate.

Flaming fist is medium armor(half plate) as well.

There is not one plate armor model in the game, except the Oathbreaker knight, who uses the plate +1 model in a different colour. That armor is not available for us now though.

The problem is that not only there is not even one plate armor in the whole 3 years of EA, but the one we saw for the oathbreaker knight, still has weird misalignment issues from the waist down. It's like larian forgot how to design proper armor. Oh well.

It does leave me worried for the final release though. Are we gonna see some good looking plate armors? Will they remember that kneecaps are supposed to cover the shinguard and not the other way around?

Who knows :p