can i still join a sorority if i’m 23?

Yes, you can. Quite a few girls pledge as juniors and they are 20 or 21. That is not uncommon. We are far more laid back about things here than at, UT or SMU, etc. I know a few older pledges and quite a few guys who pledged fraternities at 23, 24, 25 after military service. If you want to go for it, do it! Best of luck.

You definitely can join a sorority at 23! But I would think about it hard. Most of your pledge class would be 18 and those are the girls you end up befriending. If you’re totally fine hanging out with 18 year olds-girl go for it! But if you’re not into the drama, prettiness and don’t have the patience for having a bunch of friends who haven’t figured out themselves yet- then maybe look at joining another org on campus.

The question you need to be able to answer is, why would you want to join a sorority at 23? I understand you missed out, but as others have pointed out you will be older than nearly everyone in the group. You will spend the majority of your time with 18 yo women.
As a junior, you are already at a disadvantage. Some houses will cut you because you will not be around long enough. The preference will always go to a freshman.
But SFA isn't like other schools. You do have a chance of getting in, but be sure you can articulate your reasons to the women you speak with during recruitment.