In Salesforce, Global Publisher Actions appear in the Chatter publisher on the Home page and in the Global Actions menu in Lightning Experience. When a Global Action is configured but does not appear, the most common cause is the Record Type being set to the default -Master - value, which may not be accessible to all profiles.
Scenario: "For example, a Salesforce admin creates a new Global Action for logging a call but notices it doesn't appear in the publisher for most users."
The reason for this is due to the global action Record Type being left at the default value --Master--
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