Can we edit posts that we've made?

I noticed on the FAQs it says that we can only edit posts for a limited time and not after someone has replied but I regularly see people posting edits on their posts even after others have replied so I thought maybe this is old information?

This is mainly for the application timeline threads. I keep seeing posts people have made stressing that you should not add a new post just to update your application timeline and you should just edit your original post with any updates otherwise you risk cluttering the thread, which I agree with.

Anyway, is there a way for me to update a post or has this functionality been removed?

You can edit your posts for 180 minutes once they have been posted. After that they are locked for editing.

Just add a new post for timelines.