@JoseC12
I have made a test based on your codes, and it can work properly.
Could you please check if the Update property is correct? could you share it?
As an alternative workaround, I suggest you create a gallery to view and edit the 7 values, instead of 7 editform
1. create a horizontal gallery, add a Textinput inside the gallery
2. set Gallery Item property:
Filter(TAREA; SEMANA = Lista_semanas.Selected.NOMBRE && SERVICIO = Gallery_Servicios.Selected.Name)
3. set Textinput Default property: ThisItem.'HORAS PLANEADAS' , set DisplayMode property: VarMode
4. add a Edit button, set OnSelect: Set(VarMode,DisplayMode.Edit)
5. add a save button, set OnSelect:
ForAll(RenameColumns(Gallery1.AllItems,"ID","CID"),Patch(TAREA,LookUp(TAREA,ID=CID),{'HORAS PLANEADAS':Value(TextInput1.Text)}));Set(VarMode,DisplayMode.View)

Sik