Changing access request settings 'Allow members to invite others to the site members group' with PNP

Hi  nemanja011​  , I just came across this post. Might help. 

Disable-PnPSharingForNonOwnersOfSite -Connection $SCConn  #This will also disable Access Requests

Set-PnPRequestAccessEmails -Connection $SCConn -Disabled:$false #Enabling Access Requests with default setting 

nemanja011 Check if below references help you somehow:

1. SharePoint Online: Configure Access Requests Settings using PowerShell 
2. Set-PnPRequestAccessEmails 

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