You have 2 choices.
You can buy a longer platform and plates.
OR you can run it twice thru yours. Start the run, with the die and card hanging off the end. Then slide it down to cover the uncut part with the plates, and run it again to complete the other half. I hope I am making sense. I would suggest you tape down the die to the CS with some washi so it does not shift around. Not hard. You can do it!
I found an example w Jen McGuire. At 2:34
https://www.youtube.com/watch?v=hAW3-7Z-vc0
If you decide you will be making a lot of these cards,
or other longer items, you may decide to get the longer stuff.
Assuming you have a big shot...this is an example. You may well find it cheaper. I did but that was years ago. Plus you will need extended plates.
https://www.scrapbook.com/store/sz-656780.html?w=big+shot+platforms