I doubt all of the Kh-22s that have been employed in the war in Ukraine have been converted to Kh-32 standard. I have been watching this issue with some interest, and the claim that Kh-22/-32 has thus far evaded intercept appears pretty consistent.
There's no doubt whatsoever that it is a very challenging target, but I certainly think PAC-3 CRI, PAC-3 MSE and SAMP/T can do the job.
I think the most likely explanation is that Kh-22/-32 is being primarily employed against Ukrainian targets beyond the reach of where the most capable Western supplied SAM systems are being deployed. Patriot batteries, for example, appear to be present to defend Kyiv, Lviv and Kherson but cannot offer coverage everywhere else.
In other words, Russia has been shooting them into areas where the best SAMs are absent, in places like Dnipro, Kremenchuk and Odesa.
For example, many launches of Kh-22/-32 appear to be made in a north to south direction, e.g. from the Kursk and Belgorod directions south into Ukraine. This would make their interception by SAM batteries located in places like Kyiv simply impossible.
Russia’s Kh-22 – the Missile Ukraine Has Yet to Shoot Down (Kyiv Post, 29 Dec 2023)