Hello @Johnny Blaze
Welcome to Q&A forum!
When OneDrive files don’t show up after setting up a new computer, it’s usually due many reasons. So To ensure I can provide you appropriate information, I’d like to confirm a few details:
1/ Are the missing files visible when you log into OneDrive via the web?
This confirms whether the files are stored in the cloud or were only local to your previous device.
2/ Did you use the same Microsoft 365 account on your previous device?
If a different account was used, the files may be under another profile.
3/ Are the missing files large in size?
If they are, it might take some time for them to finish uploading or syncing to your new device.
4/ Could you double-check these files on your old device?
If possible, please check whether these files have been uploaded online.
My questions can help clarify the issue, and your answers may point to the root cause. Please review the information and share your thoughts so we can move closer to a solution.
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