Yes, you can handle it like that.

Set the text box On change event to call a nanoflow. Then set Apply changes to While user is entering data. For Apply after (ms), use 0 if your Studio Pro version allows it, or otherwise the lowest value available. That way the nanoflow is triggered as the user types, so it behaves very close to running on every keystroke.

Then, under the password field, show the password requirements as separate text lines. Keep them passive at first, for example in a neutral color.

Inside the nanoflow, check the entered password against each rule one by one. As soon as a condition is met, update the related requirement so it becomes active. This gives the user live feedback while typing.

You can also make it more user-friendly by adding a green check icon in front of each requirement when that rule is satisfied. That usually makes the password policy much clearer than relying only on the default popup.

If this resolves your issue, kindly mark it as accepted.