We cannot customize search feature of Portal to enable search against custom entities so far.
Legacy version of Portal has this feature by editing ASP.NET Page Template. But obviously we cannot edit any ASP.NET codes in Online version of Portal.
Customize Search
https://community.adxstudio.com/products/adxstudio-portals/documentation/developers-guide/search/cus...
Please add the feature to enable search against custom entities.
Thank you for your suggestion. Enabling the portal to handle search results of any custom entity is an important feature. We are looking at ways of doing that in a configurable manner as we don't currently have custom development support in portals.