2021 Radiant Red RTL
It certainly looks like this one from Honda, but as mentioned it is aging. It was expensive in its day.
Honda Parts at HondaPartsDeals.com: Honda Accessory, Honda Car Parts, Honda Auto Parts, Honda Accord Parts Tonneau Cover(Ridgeline) [Honda Accessory] - This system provides a two-piece hardtop cover with lockable storage. The tailgate can still b...
OEM Honda Hard Tonneau Bed Cover (08Z07-SJC-102). Currently installed on my 2013 Ridgeline. Will come with all hardware necessary to install. Works fine, just prefer to go without a cover. Fits 2006 - 20014 Ridgeline. $300 obo. Located in central Iowa.