I think we are all learning the new layout.
If I click the Forum tab at the top, it will also show me a Recent Discussions side bar on the right side of the page.
You can also use the Notifications, and Subscriptions to see posts you've commented on in the past. It can let you know if anyone has quoted, or commented on your past post. They are directly underneath the Gallery Tab.
You can also click the New Posts tab at the top, and then decide how many days you want to go back up to 2 weeks.
So far the desktop version is a lot more user friendly, than the phone version. But I have hopes it will be worked out.
Not all those who wander are lost.
Life is just a leap of faith.
Spread your arms and hold your breath and always trust your cape.
Two things define you. Your patience when you have nothing, and your attitude when you have everything.