I need to delegate a filter query with a simple in operator. It don't work.

Hello

I'm actually working with a SharePoint List used as the "library"of spare parts for my work.

Actually more than 3000 rows.

I need to filter this table to get only the parts wich are used for a specific machine.

So, in the list, i have a first column with multiple choice to select wich machine are concerned by the part.

As filtering is not working with this kind of column, i create a hidden column where a power automate is concatenate all selectionned fied in a single line of text as "Engine 1; Pump 2; Saw 4" etc...

In powerapps i'm trying to get a table with the good machine selected.

I do this filter in the string column.

ClearCollect(TEMP_TEST_CATALOGUE; Filter(Catalogue_U29; Tete_liste_IO = "CPR Principaux;"));;   
   >  This function is working but will only work with parts with just the good machine selected. For exemple if a parts is used my "Engine 1" and "Saw 4". It will not works because the ' = ' Operator is looking for "Engine 1" and dont match with "Engine 1; Saw 4"
 
ClearCollect(TEMP_TEST2_CATALOGUE; Filter(Catalogue_U29; TEST_CHOIX_IO in Tete_liste_IO)) 
   >  This function is not working.
 
in looks not working
but here : https://learn.microsoft.com/en-us/power-apps/maker/canvas-apps/delegation-overview
I can read this operator should be delegate
 
If someone can help me ? 
I don't understand why it's not. 
 
Kind regards..