Can you do this to do bonus action attacks as an armorer?
The Dual Wielder feat grants the following:
You gain a +1 bonus to AC while you are wielding a separate melee weapon in each hand.
You can use two-weapon fighting even when the one handed melee weapons you are wielding aren’t light.
The Thunder Gauntlets are described as follows:
Each of the armor’s gauntlets counts as a simple melee weapon while you aren’t holding anything in it, and it deals 1d8 thunder damage on a hit.