Partner addon are not retrieved from searches

When creating an addon from a partner, the filter displayed in the Marketplace doesn't list the associated parter addon. are not listed when selecting the partner filter

• New partner entry : Amexio
• Addon Package: https://nos-preprod-connect.nuxeocloud.com/nuxeo/site/marketplace/package/partners-nuxeo?version=0.0.0-SNAPSHOT
• Addon package name: partners

Searching for "partners" in the marketplace leads to 0 result: https://nos-preprod-connect.nuxeocloud.com/nuxeo/site/marketplace?query=partners

When clicking on "Amexio" partner link, there is 0 result: https://nos-preprod-connect.nuxeocloud.com/nuxeo/site/marketplace/partner/Amexio.

After some investigations, I've realized we don't have the property "Partner" or "Vendor" pointing to the mp_partner directory. We still have the "Vendor" input text area, which is a freetext. Even if I set the same value as the vendor value, it doesn't change anything:

<nxpkg:vendor>Amexio</nxpkg:vendor>