Staff's answer for this
can be found here. Though it's dated from 2019, just before covid, in every recent video calls the community had with staff, each time this question was brought up, the answer has been the same: Not planned or even considered anytime soon (despite the constant and repeated requests for it).
If Waze were to create features that were more focused on commercial drivers, they could simply toggle them on or off with a "truck driver mode" button which would show or hide things that are truck driver specific like bridge heights, weigh station locations, truck service centers, etc.
Imagine they add the button tomorrow, it would just be a gimmick. Simply because besides for some locations, none of the other parameters exist in waze.com/editor and without being able to add those details in the Map Editor, enabling truck mode wouldn't actually work.
Making it work would be very complex due to all the data it would require, like road weight limits; seasonal weight restrictions; heights of the trucks and overpasses etc... etc... which the Waze map currently does not have at all.
If it ever would be considered, it would still require a HUGE effort on the community of volunteer map editors to accurately find and add this data to the map, and would probably take a long time before it could be considered reliable enough, not to mention all the legal and liability aspects that it could involve.
So if it's added on the roadmap someday, just don't expect it to be available the week after, it would probably be a matter of months or more likely years to build and implement for reliable use. I also wouldn't be surprised if it proved more often to be frustratingly inaccurate than actually helpful, depending on areas.
The Community has never been against the idea, we just can't decide and I'm trying to put things in perspective about how much effort it would actually take to make this a reality, because it's really not as simple as adding a switch.
Some regions have less active volunteer editors than others, and most of us are car drivers who wouldn't be very knowledgeable about truck routes, so while some hyper-local areas could be mapped well with coordinated efforts, many others would be less so, and it would precisely be in unknown territories where you may need to rely on the GPS more than where you're familiar with the roads.