can anyone enlighten in detail about which tracking setup to go between "domain tracking" and "pixel-only" tracking? I realize that when it's about a conversion campaign, FB selects "domain tracking" as default instead of "pixel-only" and whenever "pixel-only" is selected, it gives the warning of "you haven't selected a domain that prioritizes your event for iOS 14.5. Your ad may not deliver to people who have opted out of tracking on iOS 14.5 or later devices."