@Zoohouse you can always go and visit the public timeline of any instance in your browser.

As for web app interface, remote timeline seems to be implemention specific. At qoto.org it is possible (and useful!). Obviously also in some of the front ends to pleroma. C.f. links from discussion starting here: https://roadtoad.social/objects/4b4833b0-153e-423c-9d5e-6761f74390ae