These are all Amazon links w/o reviews (sorry…) – there’s a ton of these kits on AliExpress. Most of them include mopping stuff too, although that isn’t supported on the Wyze version (yet?)
Tucson Updated Side Brush Mop Rag Main Brush Fit for Viomi V2 Pro V3 Mop P Filter HEPA V-RVCLM21B Mijia STYJ02YM STYTJ02YM Conga 3490 Accessories https://www.amazon.com/dp/B08RZ2CV45/ref=cm_sw_r_cp_api_glt_fabc_8GQKZBA0AMD4B2XDXQSY
Monland for MIJIA Sweeping Mopping Robot Vacuum Cleaner STYJ02YM Spare Part Kits Water Tank HEPA Filter Main Brush Mop https://www.amazon.com/dp/B08GSG721B/ref=cm_sw_r_cp_api_glt_fabc_NDME8Z7KSMH6N7J66A4H
LIUWEI 15Pcs Side Brush Mop Cloth Replacement HEPA Filter Fit for Xiaomi Mijia STYJ02YM Vacuum Cleaner Spare Parts Kits https://www.amazon.com/dp/B08RY2ZPQ4/ref=cm_sw_r_cp_api_glt_fabc_6B9X8EQYT90C7EQXT4D0