default or selected kernelversion does not have config value CONFIG_SCSI_ECOSCSI.
Result is shown for kernelversion 5.15.113

EcoScsi support (EXPERIMENTAL)

modulename: ecoscsi.ko

configname: CONFIG_SCSI_ECOSCSI

Linux Kernel Configuration
└─>Device Drivers
└─>SCSI device support
└─>SCSI low-level drivers
└─>EcoScsi support (EXPERIMENTAL)
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
This enables support for the EcoSCSI card -- a small card that sits
in the Econet socket. If you have an Acorn system with one of these,
say Y. If unsure, say N.

source code: