Worth noting that Samsung doesn't allow the bootloader to be unlocked in most (if not all) of its flagship devices released in the US. Although, there's paid services that could unlock the bootloader.
Re:I want a computer that I own
by robotnikman on Tuesday March 09, 2021 @12:05PM
(#26400835)
And if you do unlock the bootloader, you blow the Knox E-Fuse, meaning you can't use banking or payment apps
In case you do want to install a custom Android distribution (ROM) to clean out the Samsung bloat more thoroughly, the risk of hard-bricking your phone is almost non-existent nowadays. The worst that can happen is usually a soft-brick which can be fixed by reinstalling the original OS. As for Play Store, most custom ROMs either include or support installing Google services and Play Store with full functionality.
(disclaimer: I work on custom kernels and ROMs)