Clickable relationship properties

[jamesamcl]

For example here:
https://www.ebi.ac.uk/ols4/ontologies/upheno/classes/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FUPHENO_0081581?lang=en

I would like to know where "cross-species exact match" is defined (in this case in the SEMAPV ontology), but I can't click the heading and there is no ontology ID next to it. Compare to the RO relationships in the class expressions below which are clickable.

I can find the link to SEMAPV from the API so the data is definitely there, just not displayed in the frontend.

[jamesamcl]

It does need to be clear that they are still headings, but maybe a "link out" icon next to them with a tooltip/can be clicked to go to the definition of the property?