The set-up looks great! I have the same OEM roof racks on my 2021 (blue flame) corolla hatch. I think I located the Thule basket on amazon (https://www.amazon.com/Thule-859XT-Canyon-Basket-Black/dp/B01DWRB4TI/ref=sr_1_2?dchild=1&keywords=thule+roof+basket&qid=1623769562&s=sporting-goods&sr=1-2)
Do you have a link for the roof bag (that is compatible with the basket)?
We have the Thule Canyon XT and it’s awesome.
It’ll fit your factory crossbars.