Filter by Levels

1. With the Shop Page

Simply, to use Filter Group in archive product page, please follow these steps:

Step 1 - Go to Appearance Theme Options Product Group
Step 2 - Please create groups' taxonomies here:

2. With the Archive Products Page

You can set override GROUP PRODUCTS for Root Product Categories (Parent=0) here:

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Outline
1. With the Shop Page
2. With the Archive Products Page