how do i remotely remove my apple id from a lost device?

i lost one of my iphone 11’s during a taxi ride in philippines. after i lost it, i used another phone of my one to try enabling lost mode on it using find my iphone. now that i’m back from vacation, i’ve decided to go through with completely removing that phone from my apple account in order to preserve my security and privacy. but i’m not very sure how. i tried going to settings > my apple id > scrolled down to the devices my account is on > tapped my missing phone and pressed “remove from account”. after that, my missing phone no longer shows up and i thought that was it, but i’m still worried and that’s why i’m seeking help. the missing phone (still in lost mode and has a red lock icon) still shows up in find my iphone, and i have the options “erase this device” or “remove this device”. i chose erase—as directed by customer support whom i called earlier. so am i done? is there anything else i need to do to remove my apple id account from that phone? or have i already succeeded?