Btw, I found out recently that even if a goy does not get a chelik in olam haba either because he didn’t observe the 7 Mitzvos perfectly or didn’t do them for the right reasons, this does not mean that he will not be rewarded after he dies. A cheilik in Olam Haba is a specific type of reward (presumably the best) but there are other rewards.
I was very relieved when I heard this because there can be very good people who did not keep all the 7 Mitzvos perfectly or for the right reasons.