hi! unfortunately tags that have two or more characters together almost always count as a ship tag, which means if you want to tag your content as platonic it's better to just put separate tags, ex. #kaeya #diluc and something like "platonic" or "not a ship post", that will make it clear enough and not offensive in any way
i'm sure there are people even under rgbrs tag who mean no harm and aren't antis but again it's needle in the hay and usually using it will get you muted/blocked by kaeluc/luckae part
sorry i can't be more helpful ;u;