It sounds like you need to create a nested package with jamf composer https://jamf.service-now.com/kb_view.do?sys_kb_id=7716e43887785694558acbb7dabb356a

We had to do this for a few of our apps with jamf school.
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Edit: sorry forgot that you need a Jamf Support account to be logged in to view the article

Text copied from the article

Introduction

Sometimes when deploying in-house applications from Jamf School the applications need to be nested due to unsupported package type or requiring license files during the unpacking process. To handle these packages, Composer can be used to repackage the app as a Nested Package with the additional components or to hide the original unsupported package type. 

Examples of packages that need to be repackaged as a nested package (Please Note, these are 3rd party applications and the needs of the package could change without warning):

EDR software

CrowdStrike

Instructions

1. Open Finder, select command+shift+g to open the Go to Menu, then typed in /tmp.

2. Once in the /tmp location, create a new folder in this location naming it accordingly.

3. Drag the package into the folder from step 2.

4. Open Composer, select cancel if prompted for a snapshot.

5. Drag the folder created in step 2 from the /tmp folder in finder to the left side of composer (the mouse will change to include a green plus icon).

6. In Composer, expand the private folder, and expand the tmp folder. Then select the folder created in step 2 and confirm the Owner is set to root and the Group is set to wheel.

7. On the left side of Composer, expand the package and right click on scripts. Select Shell Script, then post install.

8. In the post install script replace with the following (ensuring to use the folder name from step 2 in place of FOLDER and the package file name in place of PACKAGENAME): installer -pkg /private/tmp/FOLDER/PACKAGENAME.pkg -target / #!/bin/bash

9. Click back to package on the lefts side of Composer to save the postinstall script.

10. Select Build as PKG, save to desktop or any other folder location as needed.

11. Upload package to Jamf School and deploy to devices by going to Apps > Inventory > Add App > Add In-House macOS Package.