Hey there,
I'm currently facing an issue of the Work Log tab has gone missing. I've read somewhere that in order to get that tab in the first place, we need to have the time tracking to be enabled.
But before the tab went missing, we've never enabled the time tracking in the first place (at the time we were new to Jira and we still are), but its always there for us to log manually.
As you can see from the image above, that was the old screenshot that i found where it has the Work Log tab.
But now it looks something like this:

I couldn't find any documentations about this, or maybe I'm not understanding it very well, but would appreciate if any of you could give me a hand on this.
Thanks.