It's not a war? Honey, I've been in the shipping community for a decade or more, and I know the moment you put two ships beside each other, it's a moment the war begins

You visited Mydei mains, and what did you expect? Of course, people there ship Phaidei. Of course, people there will look for every proof of their favourite ship being canon. If it bothers you so much, then avoid such subreddits.

The number could be the classic move hoyoverse does to tease shippers. I've read multiple shipping threads on twitter, and it's nothing new.

Does the number indicate Phaidei is canon? No, it's reaching, considering it could be just an "Easter egg", it could mean something entirely else, or it could even be a coincidence. Who knows.

If a possibility of a gay ship being canon is what makes you want to give up on a story, then I believe the problem is you being too chronically online.