Yea, luckily Android can use the back navigation gesture in the PWA to traverse the site much like a browser tab's history. Android even has the lesser know forward navigation as well: handy when you accidentally pressed the back navigation gesture, but don't want to have to find the link you clicked before to get back to the same page you backed out of.

I wish the website or PWA had more of a short term memory about the state of pages you visit. As when I go back and forth posts and feeds, I have to return the content sort option back to what I was using before I left the comment section, as well as re-minimize the same comment threads, even if those comment subtrees never changed sence I folded them previously.

We have a hardware back button but iOS doesn't 🙃

OP might have better luck using the Voyager or Wefwef webapp on their device, iirc that includes a back button in its UI