Native phone call as action from app

How can i initiate a SIM phone call from the app as button action to a number that was fetched from a database via API call?

You can use the Open Url Event Action or Code block, but start the URL with tel://, so tel://0123456789 will initiate a call to 0123456789. Similarly, you can use the code block and by using also the Append Text Code block, you create your final Text.

Here is a quick video of the Event Action.

Ah. Good idea. Thanks for super fast reply.