Q. I am 5.7 height can i ride Bajaj Dominar 400?

Im 5'7 as well and it will be difficult at first byt you will get used to it. It will require riding skills because the bike is quite heavy and because of the short height it might be a bit difficult but once youre used to it its a complete joy ride

Could just be fine with ur tips touching..while in motion the bike is well balanced, but when u come to a still, then the 190kg to manage becomes a bit difficult if you cannot have proper ground reachability

Yes you can ride and its perfectly fits for you.