I'm not sure if it's a bug or I'm the unlucky guy but on the server of my friend I was determined to go in the mansion and monuments but the cartographers do not propose me despite the multituples exchanges I make with them.
So I try with a second cartographer and he does the same thing as the first one.
I left the server to retry it solo in creative mode and the same thing happens
(Old dev version do the same things to me)
I found a bug in console version that seems pretty similar to my situation [MCCE-5865]
Where Rory Gatens wrote "No cartographer maps will be available if the structure(s) are not present in your world."
So I have use locate command and the game don't found Mansion and Monument nearby of my position... I will still add screenshots with F3 just in case
(Sorry if my english isn't great not my native language)