In general Concepts and conceptualization are confined only to humans.
- Concepts are defined as abstract ideas.
https://en.wikipedia.org/wiki/Abstraction
Abstraction is a conceptual process wherein general rules and concepts are derived from the usage and classification of specific examples, literal ("real" or "concrete") signifiers, first principles, or other methods.
"An abstraction" is the outcome of this process—a concept that acts as a common noun for all subordinate concepts and connects any related concepts as a group, field, or category
https://en.wikipedia.org/wiki/Concept
What sort of rational mind would attribute 'concepts' to bacteria or animals.
There are various meanings to 'sense'.
When I refer to a 'sense of external-ness', it is with reference to;
-a way in which an expression or a situation can be interpreted; a meaning.
not referring to the human five senses.
Instead of 'sense', I shall refer to 'a mode of externalness' [to facilitate basic survival] in all living organisms from 3 billion years to the present including humans.
This mode of external-ness can be classify as a spontaneous response, primal instincts, and the like.
My point is p-realists [humans] are fixated on this 'mode of externalness' as a concept [only human actively conceptualize] and grab it as an ideology, i.e. philosophical realism.
Since p-realists are so fixated on such a primal instinct as an ideology, their philosophical view grounded on the ideology is primal, proto- and barbaric.
I have stated many times, e.g. the oncoming train on the track I am standing on is external to me, not in my head. As such, I will jump off the rails to avoid that external train.
When I see any man, say Mr. X, he is external person to me [not existing in my head] from the common and conventional human-based FSR-FSK.
But ultimately, because it is grounded on a human-based FSR-FSK, it follows deductively, the external person cannot be absolutely mind-independent.
A covid19 virus with its covid19-based FSR-FSK would not realized Mr. X as an external person like all humans do.
It is likely a covid19 with its covid19-based FSR-FSK will cognize a denser bundle of molecules which it need to infect and multiply.
A 100% sonar bat with its sonar-bat-based FSR-FSK will cognize a denser bundle of molecules and not an external person like all humans do.
So, there is no absolute mind-independent things such as an external person out there.
Whatever is real is conditioned to the specific FSR-FSK.
For those who do not understand the above, research on Kant's concept of empirical-realism vs transcendental idealism. Make sure one understand [not necessary agree with] the theme thoroughly.