Can you rescale adobe stock templates

Noob question here but seems there should be an easy solution that I am not able to figure out on my own. Any help would be highly appreciated/thanks in advance. So I purchased and downloaded an Ai presentation template, not realizing the size of the artboards was set up for 1920 x 1080 px. I am new to the platform but know autocad and other programs that you can scale vectors without a problem. Does anyone know if this is possible to do before I spend dozens of hours in recreating this? I need this to layout for 8.5x11 finished product.

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