If you have concerns about UX I'd have thought you should be commenting at the design level rather than leaving it until things have got to the stage where they've been developed to the point where there's HTML to talk about.
Even technically-proficient major stakeholders (for example, managers and testers) seldom offer much in the way of feedback, early in the project.
I have learned to write my applications in a manner that affords “hands-on” testing, as early as possible, and I use techniques that allow a lot of pivoting.
I wrote the following comment, in an earlier thread[0] where I discuss this approach.
I think we agree in principle. I prefer using design tools that offer 'interactive' previews like Figma, but the idea is the same - get feedback from stakeholders as early as possible.
At smaller outfits you just have ramshackle processes that sometimes include user feedback, sometimes not. The stakeholders rarely know all the applicable personas and journeys and such right off the bat, especially for greenfield features...
Not disagreeing with you, since that would be really nice, just never really seen it in practice. Every org I've ever worked for had made UX a low priority.