How many points is possible to score using just the flower?

The maximum points possible to score using just the flower is 23 points (8 pollen and 1 nectar for the top, 1 nectar for the bottom, and 14 points for the 7 pollen and 1 nectar in between).
Rule 10.5.2
However, another source mentions a total of 21 points.
Video at 10:03

Sources
- Every Way to Score in BIOBUZZ (and How) — 7:33 to 10:03 — Brogan M. Pratt
- Every Way to Score in BIOBUZZ (and How) — 5:02 to 7:33 — Brogan M. Pratt
- Breaking Down BIOBUZZ Strategies | FTC Live | FIRST Tech Challenge — 20:15 to 22:46 — FUN Robotics Network
- BIOBUZZ Strategy: How to Win Auto, Teleop, and Flowers — 20:08 to 22:39 — Brogan M. Pratt
- Breaking Down BIOBUZZ Strategies | FTC Live | FIRST Tech Challenge — 22:46 to 25:16 — FUN Robotics Network