People appreciate blunt, pointed corrections from a copyeditor when they're worried about looking minutiae.
People also appreciate it from a mentor or developmental editor, without mentioning the specific instances, in broader advice about the techniques of crafting an impression about abstract attitudes and habits like "attention to detail", "critical thinking", "creative problem-solving".
Typos and English might be among the hardest things to advise on.
@jonoabroad That's me when I don't have access to the internet. "Oh well in that case I'll just catch up on the news. ...No look I need to get entirely off the computer, I'll do some baking, let me just get that recipe from my bookmarks. ...This is hopeless, I'll have to give in and phone the ISP, now what's their phone number again?"
@jonoabroad Or maybe not... ze googles is giving mixed results - I do remember using a plugin for it years ago. and I mean YEARS so milage may vary these days