Power APPS filter Galery compare combo box items with collection table

[Anonymous]

 Hi Everyone,

I'm struggling Now for 2 days with something i thought would be not this complicated

I have a collection collected from Sharepoint at app OnStart, in wich i have a data table like this.

I have Build a Combobox populate with ALL Distinct Values in all my program table of my collection.

I want to build a gallery where i can filter my collection.

My issues is that i can't achieve a Filter from table element to table element, like if length of Join >0

What i have done so far

On select in my combo box, i create a selected item collection

ClearCollect(SelectedProgram;Self.SelectedItems.Result)

On my Gallery ( and here comes the trouble) in cannot create the expression that fits

Filter(
        
            collectionSP;
            IsBlank(ComboBox1_1.SelectedItems.Result) || 
            IsEmpty(ComboBox1_1.SelectedItems.Result) || 
            Programs.Value in SelectedProgram
      )

But it doesn't work. I want to cross compare my 2 data table "SelectedProgram" with my collectionSP.Program data table , and returning in my Gallery all element where there is even a single match between my 2 tables

i also try a ForAll in my SelectProgram collection.

I also try to create a new colum in my collection where i flatten in a single string the whole program collection but didn't find a way to filter properly.

Thanks for the Help.