Automatic switching to LTE

Hi folks,

I am using an iPhone 15 pro max. For those that know Vancouver, I ride the West Coast Express and find that through Burnaby and into East Vancouver, my phone has pretty mediocre service in 5G. One thing I noticed however, is my phone won’t auto switch into LTE mode when the connection on 5G is poor. I have my phone set to 5G auto but doesn’t seem to make a difference.

Has anyone found this issue or found a resolution?