Sanó is due $9.25 mil in 2022 salary, but he is also guaranteed a $2.75 mil buyout for 2023 too (or a $14 mil team option). So it's really more like one year at $12 mil, or 2 years at $23,25 mil.
I don't know that the universal DH helps Sanó's trade value all that much. A lot of NL teams already have a guy or two they'd like to slot in at DH (or do a DH rotation), and if not, there are enough defensively-challenged slugger types in MLB that guaranteeing ~$12 mil for one isn't much of a bargain. And Sanó just wasn't good in 2021: 0.9 bWAR, 0.5 fWAR, in pretty much a full season of action. Per B-Ref, he would have only gained about 0.3 WAR from trading his negative defense (-8 runs Rfield) for full-time DH duty (an additional -5 or so runs Rpos).
I guess someone might take his salary, hoping for a 2019 bounceback and flipping him, especially if there is some kind of team salary floor implemented in the new CBA, but it's hard to see us getting any player value back for him.