Windows Insider doesn’t get updates

I “enrolled” to windows insider program for more than a year, and I do not get updates, I bothered me but I never got to it.
I installed the windows insider iso to get updates to Version Dev (OS Build 21354.1) (as seen in winver)

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but since then, no updates, when I try to check for updates, it runs for a few seconds and then it says You're up to date.
So what I want is to get the updates as I should.

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