Hi kyletest,
Thanks for reaching out to Microsoft!
Unfortunately, accessing in-place archive mailbox messages is not supported due to limitations of the Graph API.
Since this feature/functionality is presently not available, you can submit a feature request idea using support link, which will be monitored by Microsoft team and make the enhancements to Microsoft Graph APIs. I will also upvote for you.
Hope this helps.
If the answer is helpful, please click Accept Answer and kindly upvote. If you have any further questions about this answer, please click Comment.