This is a known problem, I think after OTA 6.6.0. you need to talk with BEV team and take it in. Essentially the car is heating up the battery unnecessarily and your level 1 charger is not able to provide that so it's eating into battery.
Your best option is through ford pass set a departure time 30 min prior to leaving and set the cabin temp to off. Mach-lee tested this last year and found it does heat the battery. But remember depending on temperature your battery may need more than 30 min
That's been the case with the NMC chemistry that Sr pack is less affected, but I don't think anyone knows about the HVBJB with the LFP pack. I mean all 23s should have the new less failure prone part anyway.
Dark mode in both screens since day 1 and also the brightness to lowest setting esp at night, as even dark mode is too bright with mid level brightness
I think ford designed the insides of this car for the small battery pack and RWD and then decided to go mustang route and then added the big pack and gt motors.