Hi @Anonymous ,
Try to put the following code to App.OnStart property and the OnChange property of TextInput1 and TextInput2 inside the gallery.
Clear(BlankField);ForAll(Gallery2.AllItems, If(IsBlank(TextInput1.Text)|| IsBlank(TextInput2.Text),Collect(BlankField, true)));
Then, set the DisplayMode property of Save button as follows:
If(true in BlankField,DisplayMode.Disabled,DisplayMode.Edit)
Save Button is enabled only when all text boxes 1 and 2 in the gallery are filled in.
Hope this helps.
Sik