I have photostructure saved to homescreen on an iPhone.
When browsing long folder paths via “View by folder” the breadcrums is basically mostly tripple-dots
A suggestion would be to hide the parent folders or replace with an generic “up”
Enough space: / / / /
Smaller: UP / /
Smaller: UP /
Tiny: UP / <fold…>
And also when using a “mapped”/“save to homescreen” website on iOS it loses all standard web-browser controls so maybe a “<-”-button in the header would be good. I know you can edge-swipe on iOS to do a “back”/“forward” but not everybody knows it