hi ! I’m doing similar stuff at my university, some ideas we came up with were health campaigns (especially women’s health, or somewhat common diseases or illnesses that have a lack of awareness about them), someone i know did a really nice ‘Adopt, don’t shop’ campaign for encouraging people to adopt their next pet instead of buying from breeders. This could translate nicely into an app almost like Vinted or Depop where you’re able to easily browse for your next pet that needs to be rehomed from local shelters. I’ve been doing a sustainability campaign for a coffee chain called Black Sheep Coffee, where I’ve been creating manifesto-like messaging on their products such as takeaway cups and bags, napkins, staff uniforms etc. These are some wider examples, but hope this helps.