owl:ObjectProperty subclass not being found?

[mcc513]

I am curious why when exploring the brick ontology (https://brickschema.org/schema/1.2.1/Brick.ttl) I am unable to see references to the things defined as entity properties in that ontology. brick:tilt is an example - (https://brickschema.org/ontology/1.2/entity_properties/tilt).
I've not tried using the recent alpha release of Ontospy, and also, I'm pretty new to all this so apologies in advance if it is a poorly posed or ill-informed question.

Relevant snippets from the brick turtle file:

brick:EntityProperty a owl:Class ;
rdfs:subClassOf owl:ObjectProperty .

brick:tilt a brick:EntityProperty ;
rdfs:range brick:TiltShape ;
skos:definition "The direction an entity is facing in degrees above the horizon" .

brick:TiltShape a owl:Class,
sh:NodeShape ;
sh:property [ a sh:PropertyShape ;
sh:minCount 1 ;
sh:or bsh:NumericValue ;
sh:path brick:value ],
[ a sh:PropertyShape ;
sh:in ( unit:ARCMIN unit:ARCSEC unit:DEG unit:GON unit:GRAD unit:MIL unit:MIN_Angle unit:MicroRAD unit:MilliARCSEC unit:MilliRAD unit:RAD unit:REV ) ;
sh:minCount 1 ;
sh:path brick:hasUnit ] .