Opening a message on my phone/tablet and I want to create a filter for that message but I cannot see where to do it. The same thing can be found from the top right menu when using the web version of Gmail.
Any workaround for this?
As far as I know, the GMail app and the mobile version of GMail does not have any way to add filters. You will have to use the Desktop/full version of GMail to create filters.
Direct way, no. Workaround, yes. Click menu in your stock Android browser or Chrome, and check
Request Desktop Site.