If your Zap isn't running when you expect it to, check if your Zap is being triggered in your Zap History. If you don’t see any Zap runs even though you know your trigger events have been happening, it means that your Zap isn’t triggering.
Because of how Zapier works, your Zap will not trigger on existing records. If you must import data from one app to another, you can use the Transfer feature.