In my opinion, no.....very narrow walkways in places, and lots of stairs (don’t remember seeing ramps). I have never seen anyone using one at the riverwalk and the last time I was there was spring break 2 yrs ago.....so pretty crowded. Of course I’m not 100% sure... the riverwalk is long so there may be more evc friendly sections.
Honestly, I don’t get the hype of the riverwalk.....I live 3 hrs away so have been many times over the years for different reasons (lots of basketball tournaments in San Antonio when my kids where high school age) But I do enjoy the boat ride you can take, just be sure to take it after dark. Totally different experience than the day time.....much more magical!
Hopefully others will chime in with their experience and observations!