On a mobile device there's no way to get from a Flow topic page to the corresponding Flow board - at least not one that I could find.
The desktop view has breadcrumb links, to solve this.
- https://m.mediawiki.org/wiki/Topic:Sgo453s170vck8lu (mobile)
- https://mediawiki.org/wiki/Topic:Sgo453s170vck8lu (desktop)
T93347: Move the topic title to h1 on Flow topic pages is kinda related to this - the generic h1 title on topic pages is just as useless on mobile devices as it is on desktop, but having a link up to the board page could be pretty useful.
See also (more desktop related): T90280: Need tabs to get from a topic page to the associated content page(s) and talkpage(s)