Yes.
That's how tags work.
They are tied to a resource location.
Just as minecraft:stone and somemode:stone are different, so too is minecraft:carnivore and mymod:carnivore.
Ok, let's do a breakdown of lazy coding.
You need a tile entity for that.
You need a tile entity for that.
You need a tile entity renderer for that.
You need to put your block in the block tags for campfires.
Just because you decide to copy one part of a block doesn't necessarily mean it will work. At least check and make sure the block isn't referencing anything else before doing so.
You haven't understood what Draco and I told you.
minecraft:carnivores is a completely unrelated tag to mymod:carnivores. There is no link between them AT ALL. You need to make a single tag (maybe myanimalmodid:carnivores), then for each of your expansion mods, you add to THAT tag. Not to a different tag for each mod.
Delete these folders:
%USERPROFILE%\.gradle\caches\forge_gradle\mcp_repo\de\oceanlabs\mcp\mcp_config\1.15.2-20200515.085601
%USERPROFILE%\.gradle\caches\forge_gradle\maven_downloader\de\oceanlabs\mcp\mcp_config\1.15.2-20200515.085601
%USERPROFILE%\.gradle\caches\forge_gradle\minecraft_user_repo\de\oceanlabs\mcp\mcp_config\1.14.4-20190829.143755
and run the refresh command again
Now I'm curious why.
I don't think its taken "years" even for a major version. The longest delay I'm aware of was either 1.7 -> 1.10 or 1.12 -> 1.14
In both cases I don't believe it even took a full year. And I know for certain that the majority of the time waiting on 1.14 was due to a massive (absolutely massive) restructuring of Forge's own code to clean up and refactor huge sections of the core codebase to be more robust.
Well, 1.16 is quite similar to 1.15, and there's this: https://gist.github.com/williewillus/30d7e3f775fe93c503bddf054ef3f93e
That's a primer for 1.15; the rendering system is probably the biggest change in that version. I honestly don't know much about the code before 1.16, but from what I've gathered a majority of tutorials are still relevant from 1.15. One major change in 1.16 that I DO know of is dimensions and dimensiontypes.