default or selected kernelversion does not have config value CONFIG_ATM_ZATM.
Result is shown for kernelversion 6.0-rc6

ZeitNet ZN1221/ZN1225

modulename: zatm.ko
configname: CONFIG_ATM_ZATM

Linux Kernel Configuration
└─> Device Drivers
└─> Network device support
└─> ATM drivers
└─> ZeitNet ZN1221/ZN1225

Driver for the ZeitNet ZN1221 (MMF) and ZN1225 (UTP-5) 155 Mbps ATM

To compile this driver as a module, choose M here: the module will
be called zatm.

source code: