Typically, (I can't speak to Fords system as I don't know it) regen is triggered by a pressure sensor on the DPF. Frequent regen can be a sign of a plugged DPF, or faulty sensor.
It may be worth taking your truck on a long hard drive with high (safe range of course) egt and rpm. Perhaps lockout overdrive or your top gear. Generate lots of heat and burn the dpf out.
I Know that the ecu on Ford agricultural equipment can be set to do parked regen, it makes the pipes glow... Might be an option for your truck as well.
Or, maybe it's time to delete. (delete and other tampering with pollution control may be illegal, this advice is at your own risk.)
The trip was through mountains 130 k one way so it was getting out on the highway and stretching her legs. That first regen completed . But to have another one the next day with a short drive and another the following day is unusual. My 2012 had the prompt screen indicating drive to clean filter. I typically know when it starts and ends due to the fuel decline and smell.
This one is a bit strange.
No deletes as all under warranty.
Thanks for responses,
Merry Christmas all!!