I compared the PBA offenses to KBL and B.League offenses, and here's what I found in that same span:
KBL:
2019-20: Seoul SK (112.3), Suwon KT (110.4)
2020-21: KCC (114.0), Anyang (113.3), Suwon KT (112.3), KOGAS (111.8), Ulsan (111.3), Goyang (111.1)
2021-22: Suwon KT (115.6), Seoul SK (115.6), KOGAS (113.8), Anyang (113.6), KCC (113.3), Ulsan (110.6), Goyang (110.3)
B.League:
2019-20: Aishin (115.1), Hitachi (114.2), Alvark (114.2), Brex (114.0), Chiba (114.0), Kawasaki (113.7), Ryukyu (113.4)
2020-21: Chiba (120.1), Aishin (119.2), Toyama (118.4), Alvark (118.2), Brex (116.4), Kawasaki (115.1), Ryukyu (115.0), Hitachi (113.3), Nagoya (112.9), Osaka (112.0), Kyoto (110.6)
2021-22: Chiba (120.4), Shimane (119.5), Kawasaki (118.2), Nagoya (116.9), Ryukyu (115.7), Brex (115.0), Alvark (114.7), Aishin (112.5), Toyama (111.2), Hiroshima (111.0)
Looks like there's kind of a difference in offensive output between the leagues. Begs the question, are the PBA's offensive ratings low because the defense is good, or because the offense is bad? Conversely, are the B.League's and KBL's offensive ratings high because the offense is good, or because the defenses are bad? Another thing is, do the imports play a big part in the better offenses?