Power Apps Choice field from SharePoint List filter the choice values formula

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 Filter(

    Choices([@MegaMenu].'Subheader Tag with Mainheader'),

    Value in Filter(MegaMenu, HeaderType.Value="Mainheader").Title

)


here MegaMenu is the List name, 

SubHeader Tag with Main header is the field name

I would like to filter the values from the choice dropdown field named "SubHeader Tag with Main header",

Then I applied filted HeaderType.Value (which is again another field in my list) equals to "Mainheader" values then dropdown values get filtered accordingly.

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