Support uploads larger than 250 MB in SharePoint / Microsoft Graph APIs

The file size limit for SharePoint files is 250 GB, not MB.

https://learn.microsoft.com/en-us/office365/servicedescriptions/sharepoint-online-service-description/sharepoint-online-limits#file-size-and-file-path-length

Graph and SharePoint do have limits on API calls for uploading files, but they both (SharePoint and Graph) have chunked upload APIs that can upload files up to 250 GB. 

This is the Graph section that mentions that (they call it an upload session)-
https://learn.microsoft.com/en-us/sharepoint/dev/embedded/build/manage-files#upload-files

Small Graph uploads-
Upload small files - Microsoft Graph v1.0 | Microsoft Learn

Large Graph uploads-
driveItem: createUploadSession - Microsoft Graph v1.0 | Microsoft Learn

Here is a list of some methods for upload files to SharePoint with a table on the limits of each-
Upload large files sample SharePoint Add-in | Microsoft Learn
The above article has some samples of how to use it as well.