Are you using a school domain email address to receive, or using a free outlook.com/hotmail.com address to receive?
If you are using school domain email, you need to contact School IT department - they have full access via admin center to investigate and adjust your spam filter if needed. Microsoft doesn't manage that directly, but Microsoft will step in to support if school IT admin requests it.
If you are using outlook.com or hotmail.com address, no, users don't have server side adjustment access.
Do you mind telling me what the school email domain is? For example, @schoolname.edu? That way I can check their public SPF, DKIM and DMARC configuration. Those are typically the most common reasons Microsoft rejects.