Custom chain is not supported

[ZAlexanderV]

I prepared an env file for the internal network and added it as env.local.
I set NEXT_PUBLIC_MULTICHAIN=false.
When building the project and running, the network prefix and network name do not change, the multisig is not visible in keplr.
If I use the values ​​from the env file in the modal form (when enabled NEXT_PUBLIC_MULTICHAIN=true ), then everything works correctly.