Condition visibility

[Guillenius]

hello, please help. I am lost, I come from bubble development but here it is a bit complicated to set conditions.
I need to add visibility conditions to some components:
In this case I need to have a button that must check all the items before finishing the requirement. It should show an alert that a field is empty if a dropbox is empty.
As in the WF (workflow) I can select an item to give it a condition.

Thx

[felixtanhm]

Typically, I have a Validation workflow which checks for every condition that I might need:

And if there is a condition that is not fulfilled, it returns an error, which changes my alert variable to be display=true

[Guillenius]

thank you, it helped guide me.