See attached images. The permissions panels margins are set per platform (https://searchfox.org/mozilla-central/rev/1ed1bb14eed9b3f27a94513387608436ea74c247/browser/themes/osx/controlcenter/panel.css#28,37).
The tricky thing here is that it seems to shift when more permissions icon are added to the urlbar. It looks like we are anchoring it to the permission box (https://searchfox.org/mozilla-central/rev/1ed1bb14eed9b3f27a94513387608436ea74c247/browser/base/content/browser-sitePermissionPanel.js#207-214), but perhaps we can be more specific
Bug 1699625 is related. We could fix both by anchoring the permission panel to the general "permission set" icon instead of the whole box.