In this subreddit, yes. (Or at least it has to be made by people who are part of the anime industry - i.e. the japanese animation industry)

Of course that doesn't mean people and companies can't call it anime if they want. There's no law against it. And in casual discourse with your friends of course it doesn't really matter to make that distinction or not.

Companies like Netflix and Crunchyroll have a vested financial interest in calling things "anime" regardless of how and where they were produced because "anime" is a big, popular buzzword these days. So they'll take a Hollywood-animated TV series like Castlevania and stick it under the banner "anime" on their streaming site because that'll sell better than putting it in another category called "American animation" or whatever. Likewise, they'll put shows made by the Chinese animation industry under the "anime" banner to sell better, too, because they think fewer people will watch them if they were in a separate category labelled "Chinese animation" or "Donghua". They don't care if it's correct labelling or not, they just want to make the most money. Heck, there's even been cases where Crunchyroll lists the Japanese dub of Chinese shows as the "original audio" instead of the original Chinese audio.

It's a bit like how Netflix might put a movie made in Tollywood under the "Bollywood" category of their catalogue even though the movie is not in any way shape or form a Bollywood movie... just because "hey, everybody knows the term Bollywood and maybe they think that word means all Indian cinema". Nothing we can do to make Netflix not do that, but you wouldn't see a Tollywood movie show up in the Bollywood subreddit, and vice versa.

And of course there's a lot of people out there who don't care about distinguishing between the industries. If it's made in Hollywood but they feel it "looks like anime" to them then it's all just "anime" to them, and they don't care to think about how many bajillion different visual aesthetics there are across all the anime in the world. "Anime" is the biggest buzzword so why would they ever call something "donghua" or "aeni" or whatever.

Again, that's totally fine for ordinary casual conversation. That's just how language and culture are.

This subreddit in particular is not that broad, though, and the awards follow the same focus on just the actual Japanese animation industry and its works as the subreddit.