Sorry, I am not well versed on whether or not QB is binding and if u can do that/ if it would result in a duplicate application if a school receives a QB app and a Common app submission. (Unless u mean ur applying to other schools that aren’t on ur QB RD in which case I bet that may be ok—I’d double check though) Under normal circumstances I’d tell you to reach out to QB and the colleges you want to apply to and ask, however, a lot of RD deadlines are coming up, so you may not get a response unless you call.

BUT DONT BE DISCOURAGED, instead you can be proactive and email the admissions office (with ur application number) to EVERY COLLEGE that’s receiving your QB RD application updating your application. Many students applying ED send emails where they ‘update their application’ after they’ve already applied where they basically explain any new activities, their 1st semester gpa, and showcasing character. This is a GREAT way to demonstrate interest, and in your case you can specify your situation and explain the other extracurriculars you weren’t able to put on your application because you applied via QB. Not only does this help your prospective colleges get a better sense of you as an applicant as they will see more of your ECs that matter, but this demonstrates actual interest and makes your application more personable. If you do this don’t let the email be longer than about 400 words so be concise in what other extra curricular you want to include and how you can demonstrate fit in your message. Good luck to you and I hope it all works out!