How to conduct counter-commitments for a service provider

in the chat https://t.me/icolorstudio - Process Workshop ???????? iCOLOR OneBox OS
received a reply from professional accountant Yuliya Domoslavskaya, [19.09.2022 17:27]
[In reply to Vyacheslav ???????? Leheza]
Good day
instead of an expense invoice, closing through the act of completed works
Vyacheslav ???????? Leheza, [19.09.2022 17:29]
[In response to Yulia Domoslavskpya]
@u_domoslav and what are the correct actions to do this in boxing at the final stage?
Yulia Domoslavskpya, [19.09.2022 17:41]
[In reply to Vyacheslav ???????? Leheza]
Similarly, as with the product:
we create a card, virtually charge and write off
+ in order not to increase the cost of the balance in the warehouse, it is possible to make a cost of 1 hryvnia, and put the correct cost of services in the order. Then the balances will converge
+ do it in native stages so that you can choose the write-off date

Why use the service? I think it's too much.
The usual action Set commitment works correctly for services as well, use it.

I, in principle, do so
but the Client asked what to do
since in fact the question is a bit broader, because services and products are included in the passport of the goods we sell
hence my question, how to do it correctly

thank you Igor