Geo-Filtering works like this in Fortnite: The game will attempt to load you into the server if its outside your radius so wait then re-search and game should be within your radius. Alternatively you can use Spectating Mode / Full radius to see where the server is located and if you don't like it, back out of the lobby and search again. As your brother's console is not Geo-Filtered it allows him right in. Also based on your Tweets you had your radius in Alaska and Russia and there are no servers there. Look at the regions shown in game and put the radius in the one thats closest to you and make sure the game region and Geo-Filter match.