https://woocommerce.com/feature-request/allow-unlimited-autoapplied-coupons-during-checkout/
Allow unlimited autoapplied coupons during checkout - WooCommerce
Dec 18, 2022 - Currently, Smart Coupons will only allow a maximum of 5 coupon codes to be auto-applied. So, if you have say 10 different coupons you want to auto-apply (each...
allowunlimitedcouponscheckoutwoocommerce