my 3’s screen was decent but did pick up wear and tear over the years, little scratches and dings from being in my pocket etc

Having failed at this with the 3 and then having recently upgraded to the 5 myself, I really recommend buying a cheap multipack of screen protectors

At this point it might be a bit early, but your best bet if you want something stock would be to find the fairphone 3 or 4 equivalent and ask the manufacturer if they’re planning something for the 5