Not OP, but I have to agree with them. The text just makes too much sense. There's no irrelevant shit tossed in for no reason, and I'm not really seeing any annoying LLM-isms.
Maybe it's British English? I would use the wording like that. But I'm German. However, a "benannte Animationssequenz" is a perfectly valid construct in German, and doesn't sound weird at all given the context.
I think it's funny when people show poor knowledge of English grammar and confidently label their own exposure gap as a flaw.
Maybe it's a bit stuffy or formal, but yes, "the named sequence" is 100% something a real English speaking human would write. And if it's a sequence of frames forming an animation, it can absolutely be a named animation sequence.
Of course, I might be wrong.