Yes, that only applies to Company managed projects. Team managed projects don't have filters, as they don't need them. They are also designed not to allow ordering because the idea is that you don't need it.
You'll note that you were responding to a question that was asked before Team Managed projects existed.
The way I found this question, others probably will too and the date alone is not something that would signal to me when something existed or not since I'm not a Atlassian employee.
I would strongly disagree on "no need to order". If for example you have a large and active backlog and want to prioritize items you need to set priority + also drag every one of them around which is doubling the time (at least) to complete this action.
And the fact that people have created an app to do just this (in lack of any Jira support for it) with the starting price of $300/year should also tell you something.
I think most people find more recent questions on the subject, judging by the lack of activity on this one.
I'm not an Atlassian either, I've just been in the ecosystem for a long time, so I'm aware of this sort of thing.
You'll need to take up the lack of sort with Atlassian's Jira product owners, but there's a strong argument that a backlog should only be sortable by rank (which is what team managed projects do). In a company-managed project/board, if you sort by anything other than rank, then you can't rank the issues any more.
The sort might be useful as a display, but it's useless for sorting a backlog, because only ranking can give you an ordered list.
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