Adding yourself to the (opt-in) map is done in your profile preferences page which you get to by clicking on your avatar and then - preferences - profile - map location
Whilst I have set my location in the profile preferences page (and saved it), it doesn’t seem to be persistent on the profile preferences page as shown below
And another famus Norman - today is the 190th b/d of M. Poubelle, born in Caen, according to Google. I’d rather have a rubbish bin named after me and experience using it than M. Guillotine and his invention …