I think live decent coverage can be easier to achieve in Enduro and even there it's nowhere closer to be achieved.
Enduro should be relatively straight forward to produce for TV, they manage it for DH afterall.
For gravel I think it would be interesting to have a structured series with 1 hour or 2 produced for TV with race footage achieved from moto, drones and helis on selected parts of the course, fixed cameras in some key sections if possible and then complemented by GoPro footage, decent graphics and behind the scenes content. With no obligation to be live it can be cheaper as it eliminates the necessity for relay infrastructure for the live signal.
Would many want to watch it after the race is over though? I'll watch baseball highlights, but not more than about 5-10 minutes. An hour TV show of cycling highlights contains, at a guess, about 30 mins of race footage and a lot of that can be pretty boring. Videos I see about gravel that do well tend to be focussed on one rider and their own race, and they do well because they''ve built a following. I'm not sure this kind of thing could support the investment needed to make it. Important to remember that any higlight shows about road, MTB, CX etc. are essentailly a second bite of the revenue stream, the only reason those pictures exist is because they were taken from the live broadcast. In this case the chopped highlights are the only revenue stream.