Had the same problem with mithral plate. I just created a homebrew plate by taking normal plate mail, adding +1 ac bonus, and updated the description/title. However this still is a "magic item" in the eyes of D&DB. So I put the "Enhanced Defense" infusion on some random leather armor and made its' weight 0.
This keeps track of the infusion being used and gives me the armor that should be available to start with.
Had the same problem with mithral plate. I just created a homebrew plate by taking normal plate mail, adding +1 ac bonus, and updated the description/title. However this still is a "magic item" in the eyes of D&DB. So I put the "Enhanced Defense" infusion on some random leather armor and made its' weight 0.
This keeps track of the infusion being used and gives me the armor that should be available to start with.
Yeah, D&D Beyond doesn't really do homebrew like this well.
You can only use each infusion once, per the rules