I know it is possible to create custom Extensions and publish them to the marketplace. I was not able to find any information on developing third-party actions for Automations.
For example, there is a list of integrations:

Can I develop a new one for a third-party system?
I'm looking for a way to develop and publish it globally for other users to consume. I'm a part of a product company and we want to give Airtable users option to integrate through Automations.
