Loss of throughput certain times of day - configuration options?

aPepwave DUO, ATT + Verizon. I’m stationary in a somewhat remote area 04693, consistently have 2-3 “bars” both sims. Good throughput in AM, everyday around 1-2p even though signal bars still there internet gets super slow and/or drops. Happens to the campground wi-fi and a Verizon Hotspot too. I will bounce manually through the provider options as one may be better for a bit. By evening situation improves. The time of day is very consistent. Is there something I can do in pepwave config/reporting to identify the cause, possible work around it? Maybe band interference? My knowledge level very basic, not finding much troubleshooting other options online. Tia.