Look at Burrows line until last year and Mahomes in his first 2-3 years, both lower end O-lines, bordering on horrible in CIN's case. Both of those teams have taking steps in the last year or two to bolster the lines as has Beane this year. For instance PFF:
2019 BUF 21st, KC 16th, CIN 30th
2020 BUF 10th, KC 11th, CIN 30th
2021 BUF 16th, KC 6th (they finally concentrated on it), CIN 30th