Looking for logging into the Steam Mobile App site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the Steam Mobile App site. After that you can login as usual with your login credentials.
https://store.steampowered.com/mobile%3Fl%3Dgerman
https://store.steampowered.com/mobile
https://www.reddit.com/r/Steam/comments/3vepd8/steam_mobile_app_doesnt_allow_for_log_in/
https://steamcommunity.com/discussions/forum/8/864972399814349468/
https://itunes.apple.com/de/app/steam-mobile/id495369748%3Fmt%3D8
https://play.google.com/store/apps/details%3Fid%3Dcom.valvesoftware.android.steam.community%26hl%3Den_US
https://www.youtube.com/watch%3Fv%3D-EVMGy95QfA
https://www.gutefrage.net/frage/steam-mobile-einloggen-geht-nicht
https://www.turnon2fa.com/tutorials/how-to-turn-on-2fa-for-steam/
https://www.giga.de/downloads/steam/tipps/steam-mobile-authenticator-aktivieren-und-nutzen-so-geht-s/
https://forums.tomshardware.com/threads/i-cant-log-into-mobile-steam-to-authorize-my-login.2544960/
https://praxistipps.chip.de/steam-mobile-authenticator-einrichten-und-nutzen-so-gehts_47623
https://gaming.stackexchange.com/questions/326493/steam-keeps-logging-me-out-of-the-mobile-application