Hello,
1- Regarding the Filter concern, as we have checked the concern and selected all the Filters under the Sidebar and it was showing the only Product that you tagged in all Brands: https://snipboard.io/vIHRi4.jpg
There wasn’t any Full List showing after selection. Please check back your Site after completely clearing browser and server cache.
2- Regarding the Icon changing, this was the closest possible Icon which we have now changed to, that you referenced: https://snipboard.io/XY6SVi.jpg
Following Custom CSS was applied in this regard on your Site:
.wd-add-btn-replace .add-to-cart-loop:before { content: "\f138" !important; }
Best Regards
