ECOGARD XC36080 Premium Cabin Air... https://www.amazon.com/dp/B00I8IU150
Why do you suppose the link indicates "Fit 2009-2019" and not '20? Just never updated on the website? TIA.
I get a replacement from Amazon every year but as noted you can also go to any big auto parts store. The size is used on a variety of Hondas so it's not a difficult-to-find item.
ECOGARD XC36080 Premium Cabin Air... https://www.amazon.com/dp/B00I8IU150