This needs to be clarified if want to remotely hide/show pin promo via Nimbus or we can use ShellService disablePin https://searchfox.org/mozilla-central/rev/9962f512b52f5faba6b5a769b9e89a2a72fb8dbf/browser/components/shell/ShellService.jsm#415 .
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This needs to be clarified if want to remotely hide/show pin private window option in onboarding via Nimbus or we can use ShellService disablePin https://searchfox.org/mozilla-central/rev/9962f512b52f5faba6b5a769b9e89a2a72fb8dbf/browser/components/shell/ShellService.jsm#415 .