hello Krisztina

If I use 'Quantity currently in stock' for one product and 'Approximate quantity' for an other product it can confuse the whole thing?  -> NO

Are you using 1 database for every object? You can't use a database for multiple objects, that can cause problems.

If you update stock in x5 shop, do you get an error? If so the database data could be wrong (password or url or something)

Other then that it should work if you provider has PHP support.

Hope one of these help you.

Best Regards

Hello Krisztina,

I already answered you at https://helpcenter.websitex5.com/ru/post/187877 you can follow that post to find the solution.
I ask you kindly to open only one post for question: It’s better for you, because you need to follow less posts, and also for the community, that can use better the internal search engine.

Thank you!