I use a S22 Ultra, and a Note 10+ and I haven't found any methods of unlocking the bootloader. There was someone on XDA who was running a service to unlock the Note 10, but he shut that down and there doesn't appear to be any other reliable self-service method available. And I haven't seen anything compatible with the S22.  

 Yeah they used to have decent exploits but they've done a good job over the years of lockign things up around the time they started intoducing Knox 

 Hell, I remember when Samsung had a website where you put your serial number in and it gave you a code that would unlock the bootloader. They're not doing that anymore!