https://www.amazon.com/gp/product/B07K9MQTB1/ and https://www.amazon.com/gp/product/B07T3KCQ94/
They're both extremely similar; you really can't go wrong for <$25. I actually have 3 of the cheap one now, only 1 (the initial order) of the more expensive one. They're functionally identical for my usage; and it's a huge ergonomics win no matter what.
Also, if you have a desktop mic, buy a microphone arm for it; is similarly fantastic price-vs-value proposition (though monitor arm is massively more useful upgrade just due to how much you use it).
edit: apparently I have the premium version. Not sure they used to be called premium. The spring mechanism counterweight makes adjustments to my 27 and 24 inch monitors seemless.
It’s great and handles the two screens fine, can lock it off by tightening up the Allen headed bolts once you have it just so.