Product attribute NOT working in woocommerce sidebars

Hi,
All other wc sidebar filters are working, but product attribute (where I added attribute to single products by BRAND, Temp. range) is not showing up in woocommerce sidebars.
https://iqm.no/Dummy/produktkategori/instruments-2/cold-chain-bio-preservation/biomedical-freezers-and-refrigators/ultra-low-temperature-freezer/

It is important to sort out certain models according to specifications.

Is there anything I have done wrong?

The page I need help with: [log in to see the link]