1) If I work for uber eats which is a company of home meal delivery am I allowed to carry non halal food in my car in order to serve them to non-muslims? Would my money be halal ? What if I come to know at the last moment that the one who had ordered the meal is in fact a muslim?

2) What if he knows it, but wants to sin? Should I serve him?

1) If the delivery is for non- Muslims, no problem.
For the Muslim, you should inform him that this food is not halal.

2) No