"Sentient" is more about senses. There seems to be a bit of disagreement and overlap, and the way they throw the murky "conscious" into the definitions doesn't help.
https://en.wiktionary.org/wiki/sentient:
Adjective
sentient (comparative more sentient, superlative most sentient)
1. Experiencing sensation, thought, or feeling.
2. Able to consciously perceive through the use of sense faculties.
3. (loosely, chiefly science fiction) Possessing human-like awareness and intelligence.
Synonyms: sapient; see also Thesaurus:self-aware
https://en.wiktionary.org/wiki/sapient:
Adjective
sapient (comparative more sapient, superlative most sapient)
1. Attempting to appear wise or discerning.
2. (dated) Possessing wisdom and discernment; wise, learned.
3. (chiefly science fiction) Of a species or life-form, possessing intelligence or self-awareness.
Synonyms: sentient; see also Thesaurus:self-aware
https://www.dictionary.com/browse/sentient:
adjective
1. having the power of perception by the senses; conscious.
2. characterized by sensation and consciousness.
https://www.dictionary.com/browse/sapient:
adjective
1. having or showing great wisdom or sound judgment.
2. having or showing self-awareness