what are the characteristics of tathā?

can tathā be described as “thing-in-itself”? how about “natural state”? properly, thing-in-itself , is a Kantian invention that denotes objective existence. is tathā a buddhist goal? is tathā liberation? does the experience of tathā generate attachment to a self-entity? is there a useful relationship between tathā and bhava? from https://www.learnreligions.com/tathata-or-suchness-450014 “the word tathata is sometimes used interchangeably with sunyata, or emptiness. While all phenomena are empty (sunyata) of self-essence, they are also full (tathata). They are "full" of reality itself, of everything.”