Hi
The workaround is quite simple. You need to enter interactive mode and trigger your interaction. For example, if you have a button that is calling some API, you can enter interactive mode and click the button. The next time you open the second action, you should be able to see the value of the first action. Be careful with it. Since you will be invoking those actions, you need to pay attention to operations that update/delete your data.
(You can check this Focus mode vs. design mode | Learn Plasmic for reference on how to go to interactive mode)