How long does cooked beef mince keep in fridge?

I’m not great in the kitchen. And also not great at how long things should keep. My friend who had been doing meal prep support for me for a while eventually gave me a chart (similar to the one in the wiki) for food fridge timings. However I’m a bit confused. The section for ground meats/hamburger it doesn’t mention if this is cooked or uncooked. And it says only 1-2 days but I seem to remember my friend saying that beef lasts longer in the fridge than chicken. So now I’m really confused and not wanting to have lunch cause I don’t know if the patty and egg (both cooked) I have in the fridge will be ok or not. Can anyone give some straight forward guidance. Btw the patty and egg were cooked Thursday last week