MAGENTO 2 SHIPPING & PAYMENT PER CUSTOMER GROUP
The store admin can restrict particular shipping and payment methods for certain customer groups. So this customer group can see selected specific shipping and payment methods set by the store admin. Magento 2 Shipping and Payment per Customer Group Extension allows the admin to select shipping and payment methods for certain customer groups at the checkout process. So the customer groups can only see specific shipping and payment methods while placing an order.
https://www.cynoinfotech.com/product/shipping-payment-per-customer-group-magento-2-extension/