Hi, unfortunately your user from Map builder (that you used to sign in Map builder) is not connected directly to your original OSM account. They are two separate accounts from OSM perspective. Additionally, this change from you was flagged to go through our editorial team (as a precaution). In the future, to improve this, we are working on single-sign on (SSO) from within Map builder application, so you can login using your OSM account and those changes will be credited to you. You can track progress on https://github.com/openstreetmap/openstreetmap-website/issues/4128