Are they allowing family/friends to attend our graduation after basic?

First, good luck i basic. Put your heart into it. Yeah, it will suck at first, but it gets better at graduation day, and then the suck will be replaced with pride. Realistically speaking, it's 3 months away, so things could change between now and then. You won't know for certain until a couple weeks before graduation. Interestingly enough, my report date was 10 May, 1990 at Fort Leonard Wood, A/5-10. Good luck.

It is situational. Need to speak to the Drill Sergeants.

Check the web site of whatever fort that you will conduct basic training at. As one example, Fort Jackson does not allow in person attendance for graduation as of April 2021. It may be different at another post (e.g. Fort Benning, Fort Leonard Wood, etc.)
https://home.army.mil/jackson/index.php/my-fort/basic-combat-training/graduation-information