how change defualt powershell version running from WAC?

hi guys

how can i change default WAC PowerShell console version?

according to my test, PowerShell v5 is  the default PowerShell version that is run when we choose "PowerShell". i have install PowerShell 7 to my server manually but WAC does not use it. how can i change the WAC to execute pwsh v7 instead of old version?
i try to execute pwsh v7 manually inside WAC PowerShell console but is not help me. 

thanks.