I just bought the ones on Amazon:

Google Pixel 3 XL Case, Arae [Stand Feature] PU Leather Wallet case Wrist Strap [4-Slots] ID&Credit Cards Pocket Google Pixel 3 XL (Not Pixel 3) - Black https://www.amazon.com/dp/B07FXTBHYN/ref=cm_sw_r_cp_apa_i_Vk00BbJRZ86TF

I've used the same style (and probably manufacturer) since the note 2 and been very happy.