Is Emoji_Keycap_Sequence in reverse order a legal Emoji?

[yisibl]

const emojiRegex = require('emoji-regex');
const text = `
\u{39}\u20E3\uFE0F
\u{39}\uFE0F\u20E3
`;

const regex = emojiRegex();
for (const match of text.matchAll(regex)) {
  const emoji = match[0];
  console.log(`Matched sequence ${ emoji } — code points: ${ [...emoji].length }`);
}

Output:

Matched sequence 9⃣ — code points: 2
Matched sequence 9️⃣ — code points: 3

U+FE0F(VS16) reverses the order here, and I'm not sure how the Emoji spec defines this situation.