regedit

[HKEY_LOCAL_MACHINE\Software\Policies\BraveSoftware\Brave]
"BraveRewardsDisabled"=dword:00000001
"BraveWalletDisabled"=dword:00000001
"BraveVPNDisabled"=dword:00000001
"BraveAIChatEnabled"=dword:00000000
"MetricsReportingEnabled"=dword:00000000

/etc/brave/policies/managed/firm_policy.json

{
  "BraveRewardsDisabled": true,
  "BraveWalletDisabled": true,
  "BraveVPNDisabled": true,
  "BraveAIChatEnabled": false,
  "MetricsReportingEnabled": false
}