Hi Erica,
Thank you for posting, I am here to help. I’m Sorry you Are Having This Problem. Make sure your USB that you are using for recovery is set to FAT32 file system.
If you already tried Surface recovery image using USB and still getting this problem.
I recommend that you refer to article try to follow the steps to solve the Surface Boot Error problem. I
click this link to open the article:
If it still doesn't work, please follow the method at the end of the link to create a repair order, and your device will be sent back to the Surface after-sales center for repair.
looking forward to helping you out. If you need more help please let me know. If the answer is helpful, please click "Accept Answer".
Best regards,
Jansher