Fortune on beetroot will give you more seeds, but not more beetroots

can confirm for 1.16 Release Candidate 1

Confirmed/Reproduced in 20w27a. 

Wheat and Beetroots don't give multiple Wheat or Beetroot items. They do give more seeds.

Can confirm in 21w18a

Can confirm in 1.17.1.

Confirmed, but this is likely intended.

Can confirm in 1.21.4. I would like to request ownership as currently the reporter is not active from March 2022.

Can confirm in 1.21.8