Legit Q drops do use the same trip codes, the Anon who posted that does not have access to that code, his assigned ID is on the post. The Anon lifted all that, he just didn't delineate it plainly, and whoever copied it did an even poorer job of making the meaning plain.

You can look up the legit Q Drops on either of the sites I linked, check it yourself is the best way. If I understand your question correctly, yes an Anon can and did post it, that is exactly what the Anon did, he reposted part of a Drop and analyzed it. So it appears under his Anon id randomly assigned when he posted, not under Q's trip code.

https://kekpe.pe/i/6005cd9b389fe.jpeg