If you problem is similar to what I encountered, workflows will not run when the app is closed. Regardless of whether you tell it run every 1min, if bubble is not open, it will not run.
I solved a similar problem using the zapier plugin which may help you to take a look at. I’m not sure if they allow you to trigger by the minute as I was only looking at once per day, but it’s definitely something you should take a look at. With zapier, you can create a webhook that you can schedule to trigger every day in my case, and as it is hosted by a third party will run even if bubble is closed.
You can then in bubble create an API workflow triggered every time the zapier webhook goes off that will probably say something like ‘get data from current user’s google calendar’ and update it. Zapier integrates with plenty of plugins itself so you’ll hopefully find some luck with that, if not their customer support is pretty great so chuck them a message.
Hopefully this helps you out
Charlie