Congrats on the new (to you) car! I got this cargo cover from Amazon and it works fine on my '17 hybrid; it fits right into the two little cutouts in the trunk.

Big recommendation: Get the OEM spare tire kit. You don't want to be stuck with a nail in your tire and a frustrating flat repair kit in the rain on the side of the highway.

I've been very happy with this one for my 20 EV EX: https://www.amazon.com/gp/product/B07ZCKWQNY/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1

Good quality, appropriate spring-loaded action, stows away in the trunk floor as I trust the OEM model does.