On Jaunary 8, 1798 the 11th Amendment to the Constitution was officially ratified when President Adams

[Quiet Em]

announced that it was now deemed part of the Constitution.

That's the precedent for today's announcement.

[MichMan]

1. Did the 11th amendment exceed the deadline by 40 years?

It was ratified by the states less than one year after passing congress, not forty years after the established deadline

[SickOfTheOnePct]

2. Or states

that rescinded their ratifications?

[Quiet Em]

3. The ERA is now officially ratified.

[Polybius]

5. Is it on any official government list?

Of Amendments? I'm still seeing 27.

[Polybius]

4. Thread winner by a mile

And of course, you are 100% correct.

[LeftInTX]

6. The 11the Amendment applies to the TikTok ban more than anything.

The Judicial power of the United States shall not be construed to extend to any suit in law or equity, commenced or prosecuted against one of the United States by Citizens of another State, or by Citizens or Subjects of any Foreign State.

International law scholar Thomas H. Lee argues that foreign states were intended to be excluded from the Eleventh Amendment's prohibition—i.e., that foreign governments would still be permitted to sue state governments.[14] However, in Principality of Monaco v. Mississippi, 292 U.S. 313 (1934), the Supreme Court ruled that the amendment also protects states from lawsuits by foreign entities, which Lee considers a departure from established jurisprudence;[15] his thesis is that the Eleventh Amendment exempted foreign governments in order to allow recourse for violations of treaty obligations, which in turn promoted positive and peaceful foreign relations between a fledgling U.S. and the international community.[15] Lee likewise argues that the Eleventh Amendment reflected the international legal principle of sovereign equality, whereby foreign states were of equal legal status to the U.S. states, and as such could bring lawsuits.[16]

[mahatmakanejeeves]

7. It's not 1798 anymore.

1 U.S. Code § 106b - Amendments to Constitution

Whenever official notice is received at the National Archives and Records Administration that any amendment proposed to the Constitution of the United States has been adopted, according to the provisions of the Constitution, the Archivist of the United States shall forthwith cause the amendment to be published, with his certificate, specifying the States by which the same may have been adopted, and that the same has become valid, to all intents and purposes, as a part of the Constitution of the United States.

(Added Oct. 31, 1951, ch. 655, § 2(b), 65 Stat. 710; amended Pub. L. 98–497, title I, § 107(d), Oct. 19, 1984, 98 Stat. 2291.)

Full disclosure: IANAL