Selling services in the shop using a code

Hi, is there a way to sell services through commerce without involving Scheduling? The solutions i've found so far all have the scheduling store as a different entity from the commerce online shop.

We would like people to be able to buy both treatments and products in our shop page with one checkout. My thinking is that, treatments they buy would come with a code that they could then use in the scheduler to book the actual appointment(s).

Any suggestions?

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