Vendor Shipping Pricing Setting

Hello there,
I’ve looked at your plugin in detail and it has a lot of features. First of all, congratulations on your work.

I need support on vendor shipping fees.
Shipping is free if your order is above a specific total fee. If below the total fee, there will be a shipping fee for each seller package.
*Shipping fee fixed fee regardless of distance, location or weight.

I’ve done a lot of trials but I couldn’t set the right setting.

Scenario
– Cart Page –
Shipping for all sellers’ products is free if the total amount is above $150.
If the total amount is below $150, there is a shipping fee of $10 for each seller product.

Shipping charges in the basket calculation should not affect the limit “Free over $150”.
Example: A, B and C stores have a total of $140 product in the basket.
In this case, the customer must pay $10 shipping fee for each of the stores A, B and C.
$140 items + 3 x 10$ shipping, fee should be a total of $170. $140 + 10$ shipping -20 $ should not be error in the form of more shipping fee.

– Seller Screen And Payment –
Sellers are charged shipping fee if orders over $150 are received.
For an order over $150, the shipping fee of $5 will be cut if a store’s product is below $50. If it is over $50, the shipping fee of $10 is discontinued. This applies to every seller who has added the product in the basket.
Example: XYZ product of store A in the ordered basket of $180 is 40tl, the ABC product of shop B is $140.
$5 shipping fee will be deducted as the item of shop A is under $50
$10 shipping fee will be deducted as the item of shop A is over $50
Customer will not see on the screen the shipping fee reflected to the seller when purchases above $150. Only Seller will see it as a shipping fee deduction in the commission deduction section on the order panel.

Can you add a shipping fee feature reflected to the seller for this kind of scenario to the plugin in the next update?

I would appreciate if anyone who has done this kind of transaction for a quick solution can share the function code.
This feature can be improved under this title.
Thank you in advance for your help