Hi mate,
We’ve got a solution for that which is a little messy but has worked for us for several years now.
We implemented some code into our site which multiplies the front-end price of goods by 1.2 if the customer is B2C - anyone under B2B has the price multiplied by 1.
We did this on a customer tag basis so ‘if customer tag == RETAIL’ - price x1.2 - ‘if customer tag == WHOLESALE’ - price x1
You will also need a supplemental piece of code that references if the customer is not logged in (therefore retail) - this would be ‘if customer’ - else - price x1.2.
I would recommend reaching out to a shopify expert to assist in implementing this code as there will be several sections of your site where this will need be inserted.
I hope this helps!