Hello,

I believe you can achieve similar with a simple Client Script.

1. Create new Client Script
   • Table: <Record's table>
   • UI Type: All
   • Type: onChange
   • Field Name: <Checkbox name>
   • Script:

function onChange(control, oldValue, newValue, isLoading, isTemplate) {
	
    if (newValue === 'true') {
        g_form.setVisible('textarea_1', true);
    } else {
        g_form.setVisible('textarea_1', false);
    }
	
}

If you want to run this Client Script only in Workspace, uncheck Global checkbox and write form view names into the field.

If my answer helped you, please mark it as correct and helpful, thank you 👍
Martin