Why does the sharepoint REST API return a different link than the one returned by the Graph API?

I am trying to standardize Graph API with Sharepoint REST API v2.0 since the Graph explorer validates using "whatif" that the request I make can be called from Sharepoint API, but both links are totally different

A little context, I am trying to generate an embedded link, the Graph API generates it well and it is viewable as editable, but in Sharepoint API, although it generates the link, this message appears when I open it in the browser

In the Graph API I use this url with the POST method and their respective headers

https://graph.microsoft.com/v1.0/sites/{siteId}/drives/{driveId}/items/{fileId}/preview

{
 "allowEdit":false,
 "viewer":"office"
}

And in Sharepoint I use the same but with this url

https://{tenantName}.sharepoint.com/{relativeUrl}/_api/v2.0/drives/{driveId}/items/{fileId}/preview

What Graph API returns is this

https://{tenantName}.sharepoint.com/sites/{relativeUrl/_layouts/15/embed.aspx?uniqueId={uniqueFileId}&access_token={token}

But Sharepoint API this

https://{tenantName}.sharepoint.com/sites/{relativeUrl}/_layouts/15/PreAuth.aspx?sourcedoc={uniqueFileId}&action=embedview#access_token={token}

Although in Graph explorer it tells me that I must leave "oneDrive.preview" at the end but in both cases it generates the link

The strange thing is that in Sharepoint API it returns the route with this preAuth and an access token shorter than the one returned by Graph API and I think that is why it does not show the link, a clarification, I have full access to the Sharepoint site and that the Sharepoint API link tells me that I have to request access, it is absurd, does anyone know how to fix this problem?

By the way, the link generated by Sharepoint API has an access time of 5 minutes, is there a way to increase that time?

Additionally, this link helps me to be able to view/edit within a PowerApp using a code component that uses an iFrame, it is a client requirement for the PowerApp

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