Make sure you have the latest version of the app and also try back later to log in. Sometimes there is an outage for logging into the app that doe snot effect the web.
Try to sign in through the website on your computer first. If you are able to get through, delete the app and reinstall and try to log in again. if there is still an issue signing in through the app, then wait another day as there may be an ap sign i...
based on the details you have included, then I can only rule out that your smartphone came with a weak 5G transmitter as a lot of smartphone benchmarks have also touched and benchmarks on similar matter of this topic.
It is likely the area you are in has weak 5G signal and your phone is set to automatically go to the cell type that is stronger and in your area likely has more 4G equipped cell towers.
