default or selected kernelversion does not have config value CONFIG_S390_TAPE_BLOCK.
Result is shown for kernelversion 5.4.69

Support for tape block devices

configname: CONFIG_S390_TAPE_BLOCK

Linux Kernel Configuration
└─>Device Drivers
└─>Character devices
└─>Support for tape block devices
In linux kernel since version 2.6.24 (release Date: 2008-01-24)  
Select this option if you want to access your channel-attached tape
devices using the block device interface. This interface is similar
to CD-ROM devices on other platforms. The tapes can only be
accessed read-only when using this interface. Have a look at
Documentation/s390/TAPE for further information about creating
volumes for and using this interface. It is safe to say "Y" here.