Yes the evolution is attested via intermediate "old Cyrillic" forms that still retain a shadow of glagolitic aesthetics but is likely spawned directly from Greek alphabet.
https://en.m.wikipedia.org/wiki/Cyrillic_script:
Unlike the Churchmen in Ohrid, Preslav scholars were much more dependent upon Greek models and quickly abandoned the Glagolitic scripts in favor of an adaptation of the Greek uncial to the needs of Slavic, which is now known as the Cyrillic alphabet.[10]
That said, Glagolitic itself derives from the Greek script but it was clearly an attempt to explicitly create something that looks different and not just "branching off" whatever was the current Greek script version of the time. So that would count more as "invention" (similarly to how Georgian and Armenian scripts were invented by a single person, allegedly the same person for both). Whether ties with Greek script is about inspiration or origin is hard to define and perhaps just a matter of degree.
For example, consider alphabet ordering. Even if you totally invent a new script for aesthetic purposes, you may want to keep the letter ordering from your home alphabet just for simplicity. Other invented scripts like Georgian and Armenian, also retain the Greek alphabet ordering. Does that indicate origin/inspiration? Can the ordering be something that was added on later when the need of a stable ordering of words for building lexicons and teaching people was recognized?