The Build.cs file has “GameplayTags” in it. The GameplayTagAssetInterface is also exactly as you sent, I copied and pasted in both the header and cpp file for the new C++ class I was creating. I am able to add config tags using ‘Set’, but that one specific node doesn’t show up in a copy of that same C++ file when I try within it.
I checked the entire code you sent for both the header and cpp, did some chatgpt too to understand, cleaned the build in VS and then built it again, and still no node. I’m in Version 5.5.4.