Sharepoint JSON - how to filter a lookup column in another list, by multiple values?

Question

How to change this sharepoint json code such that the formatted column with hyperlink directs to a list (with a lookup column) that is filtered by both values of [$MOCx_0023_] and empty values at the same time?

{"$schema":     "https://developer.microsoft.com/jsonschemas/sp/v2/column-formatting.schema.json",   
"elmType": "a",   
"attributes":  {     
"iconName": "OpenFolderHorizontal",     
"class": "ms-fontColor-themeDark",     
"href": "='https://ABC.sharepoint.com/sites/ABC/MOC%20files/Forms/AllItems.aspx?FilterField1=MOC_x0023__x0028_lookup_x0029_&FilterValue1=' + [$MOC_x0023_]",     
"target": "_blank"   
 },   
"style": {     
"font-size": "18px",     
"text-decoration": "none",     
"padding-left": "15px",     
"font-weight": "bold"   } 
}

Answer 1

In the JSON formatting you provided, "https://ABC.sharepoint.com/sites/ABC/MOC%

20files/Forms/AllItems.aspx?FilterField1=MOC_x0023__x0028_lookup_x0029_&Filter

Value1=' + [$MOC_x0023_]" is a dynamic URL to filter the view in list A.

For the hyperlink column of list B, JSON formatting only can set a static URL as its value.

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