What makes you think that? I had the impression he is explicitly pro-Stalin.
see also https://www.youtube.com/watch?v=LffLqUwlY2Y
(Pugacheva denounced the SMO last year, many others decamped* for Israel, and there are a few artists who stayed despite being no longer in favour and are filming clips with their phones, but as far as I can tell hi budget videos are —and have been— pretty synonymous with toeing the Kremlin line)
* the first Новогодний Голубой огонек after the invasion had to pad out the audience with military members; I had been assuming that was because either too many artists (obviously сердючка included) were elsewhere or because they had refused to guarantee their support live on-air. Haven't watched this years' yet.