There is a filter to see assets based on orientation -- portrait, landscape, and square. However, this will not be useful if assets are not manually tagged with the orientation tag.
Current/Experienced Behavior:
Orientation detection is not available OOTB
Improved/Expected Behavior:
Orientation detection is available OOTB
Environment Details (AEM version/service pack, any other specifics if applicable):
Thanks for proposing the idea. This request has been raised to the product team via the internal request CQ-4326413. The product team will triage this request to verify feasibility based on the prioritization model. This post will be updated according to the Jira request status.
@mikeetiuPH this is now available in AEM Assets Cloud Services pre-release channel, as part of OOTB Image Smart Tags. Orientation will also be detected, and available for use via the Search facet "Orientation". Please try it out and provide your feedback