The meme is satirical. It's making fun of TERFs who think they can always tell a trans woman from a cis woman from appearance alone because they think they all look a certain way. Hence the "We can always tell" at the end, which is a line commonly spoken by transphobes.
The joke being that this is a ridiculously over the top example of somebody "identifying" a TERF by appearance alone, even though that's not actually possible, just like it's not possible for trans people either. A TERF cannot refute this meme without pointing out the flaw in their own logic, and that's funny.