Dynamic System Updates not work

Hi, I know about dsu-tool in Android 10 (and upper). I flowed instructions on developer.android.com, DSU says dynamic system is prepared, after reboot, the official firmware is loaded, instead of the dynamic one. I don’t know what I do wrong. Please, help me. P.S. Sorry for my bad English, I am from Russia

Hello art930,

As far as I know, Dynamic System Updates DSU is not introduced in Samsung devices.