With reference to the documentation at Use URL parameters to create and modify maps, the examples for constructing a URL to open a AGOL web map at a specific location and zoom level, work for Chromium desktop browsers. When the same URL is opened in the mobile version of the browser (also in developer tools with device set to mobile), the URL parameters fail and the web map opens at 0,0.
Here is an example URL:
https://www.arcgis.com/apps/mapviewer/index.html?center=20,45&level=10
Result for desktop browser:
![FC_Basson_0-1711092228247.png FC_Basson_0-1711092228247.png](https://community.esri.com/t5/image/serverpage/image-id/98749i92B65F0CA0EBCC34/image-dimensions/508x392?v=v2)
Result for mobile version:
![FC_Basson_1-1711092284624.png FC_Basson_1-1711092284624.png](https://community.esri.com/t5/image/serverpage/image-id/98750iEE7A753D14B9C02D/image-size/medium?v=v2&px=400)
Theses results are the same for Chrome and Edge, but in Firefox it works as expected.