The Respect For Marriage act of 2022 requires ONLY that states recognize existing same sex marriages. If Obergefell was overturned tomorrow, zombie laws kick in over a good chunk of the country banning same sex marriage. And Roberts as well as Thomas both opposed Obergefell.
And that's not evne getting into the fact that you're sitll only talking about a single piece of legislation which ONLY requires that states recognize such marriages, it does absolutely nothing besides that. Which means that it is not only inadequate in what it does to protect queer marriage, but also that it's a very minor piece of legislation in the grand scheme of queer discrimination.