Jmeter: Not reading the property from the property location given from command line

File: DevEnv.properties

# Development Environment property file
environment.protocol=https
environment.hostname=dev.env.com
environment.port=443
environment.path=api

File: StagingEnv.properties

# Staging Environment property file
environment.protocol=https
environment.hostname=staging.env.com
environment.port=443
environment.path=stagingapi

command used jmeter -g "StagingEnv.properties" - t "Practice11.jmx";

Test Plan Structure

Test Plan
    JSR223 PreProcessor
    HTTP Request Defaults
    Thread Group
        jp@gc - Dummy Sampler
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In short value should read from file location provided in command line and when run directly then it must be read the default value.

JMX file is attached in this link

You can try defining the ${__P(variable,defaultVariable)} in User Defined Variables itself and use it with default values or command line arguments. no need for reading it from properties file.

protocol    ${__P(protocol,https)}  
hostname    ${__P(hostname,testHostName.com)}
port        ${__P(port,80)}

Then command to use it:

jmeter -Dprotocol='http' -Dhost='localhost' -n - t "Practice11.jmx";