Do my sat2 scores look good?

I have a 790 on math2 and a 670 on chem
I’m taking another one on december, though.
would 670 hurt my chances?

SAT II’s are optional–they aren’t going to look down upon you doing something above and beyond the minimum even if you didn’t do stellar. You did decent–not bad, but I would guess that a lot of UCLA applicants have a higher score. And even though I’m not an adcom, I can assure you that no decisions will be made based on your SAT IIs unless you got an absolutely dreadful score (like below 300 bad). Don’t stress out about it.