Hi onursenturk9737,
Thanks for reaching to us.
1. Try to regenerate Regenerate the product attributes lookup table in Woocommerce > Status > Tools https://take.ms/LGpvf
In addition, please check Woocommerce > Settings > Product tab > Advanced tab and disable Use the product attributes lookup table for catalog filtering
. Also, please make sure you added variable products and check again.
3. Please test this sidebar for Shop page as well to see if it works.
Best Regards,