If you’re committed to trying a s’more, you could substitute digestive biscuits. https://cooking.stackexchange.com/questions/50371/is-there-a-super-close-substitute-for-graham-crackers
Just make sure your marshmallows get browned and toasty somehow. Best is slightly crispy on the outside and melty on the inside
Do you have gram crackers at your grocery? I imagine you probably can get some type of marshmallow and chocolate? If you can get those or the brownie brittle like I used just microwave it 10 seconds
Yall got a version of smores… for me it’s like a ritual friends/family, campfire, finding a roasting stick, burning your marshmallow and having a good time… usually a camping things but I do it at the beach also