Hi @Briana_Wilson 
Thanks for your question and welcome to the community.
It sounds like this may have to do with your workspace navigation setting.
Could you please confirm your setting? You can find this by clicking on the :more_options: Workspace Setting button next to your workspace name then hover over Navigation, from there you can select your preference.
When you select Mouse, you should be able to zoom in and out using your mouse’s scroll.
Please let us know if this helps solve your issue 
Here is a topic with more information: Bluescape Workspace Navigation Guide