How to change the algorithm for applying a coupon when calculating woocommerce free shipping?

Question

WordPress

Good afternoon! The site applies 3 thresholds for free shipping:

• Moscow (Free delivery for orders over 3000),
  
• SPb from 5000,
  
• Russia from 8000
  

The plugin "WooCommerce Advanced Free Shipping" is used for this.

Everything seems to be fine, but I can't change the algorithm for calculating Free Shipping.
For example, the buyer made an order from St. Petersburg for 5500 rubles.
The system considers him free shipping.
It applies a discount coupon, let's say 20%
Amount payable falls below the threshold of 5000, but shipping remains Free.
It seems that in the plugin settings it is possible to set the use of a coupon as a parameter, but in practice the value of coupons is different and in the settings there is no way to set a condition so that the value "Total" and not "Subtotal" is considered the threshold.

Can you suggest a hook for wordpress, or a plugin with similar settings, so that free shipping gets up in 3 cases:
1st order from Moscow >= 3000
2nd from St. Petersburg >= 5000 3rd order
over 8000 rubles
If a coupon is used, then this calculation should be made from "Total" and not from "Subtotal"