I’m very poor on the mobile side of things as I rarely use my phone. There’s nothing wrong with the forums so suspect your device to connect but the other mods may know a fix/work around when they get back on in the morning US times…I know some of them use more mobile devices. Apologies I don’t know the answer to your question but maybe reset your device?
There’s nothing wrong on my mobile, so I would suggest looking up how to clear your phone’s cache. If it is a very old iPhone, it could mean it is time to upgrade as Apple doesn’t release updates for the oldest ones anymore, I think.
If I had the problem I would restart my phone, clear my history, try a different browser, update my browser, or uninstall and reinstall my browser. If that didn’t work I would download the app for the forum.