Really? that's interesting. I checked it again and it took me to the season 5 that was purchasable. The season 6 just popped up so here's the link to that one too.

Direct

https://www.amazon.com/gp/video/detail/B09PX2YKFL/ref=atv_dp_season_select_s6

Share option

https://www.amazon.com/gp/video/detail/B09PX2YKFL/ref=atv_dp_share_cu_r

I believe there are just two separate options on the site but that they bury the actual purchase options.

This is the option for the discovery plus page (which isn't helpful but shows the difference between the two)

Direct

https://www.amazon.com/Battlebots-Trailer/dp/B09NV3NQGW/ref=sr_1_1?crid=191NM9J5KG9T1&keywords=battlebots+season+6&qid=1641586999&sprefix=battlebots+season+6%2Caps%2C103&sr=8-1

Share option

https://www.amazon.com/gp/video/detail/B09NV3NQGW/ref=atv_dp_share_cu_r

https://www.amazon.com/Battlebots-Trailer/dp/B09NV3NQGW/ref=sr_1_1?crid=362GN0IYMX315&keywords=battlebots+season+6&qid=1641407502&s=instant-video&sprefix=battlebots%2Cinstant-video%2C219&sr=1-1 Right there. :)