other than facetime or zoom meetings, which in construction are not ideal, you have no good options, other than a different job
but like you say the company pays for the truck and fuel, and you get free personal trips with fuel card,
you get phone calls done in the car, you get audio books and podcasts done in the car,
the only negative i see is sitting for extended periods of time, which would happen anyway in any office job, so.... unless you want a job change, it is what it is
i have a friend doing something similar but with daily driving, in his personal (big diesel) truck, using his money for fuel, driving more miles so it could be worse